The Independence Debate

14.3 Tax Authority, Statistical Office, Diplomatic Service

A Scottish Revenue Authority would be established, building on existing Revenue Scotland capacity and taking over the collection of formerly reserved taxes. Transitional data-sharing and collection agreements with HMRC would bridge the gap until full systems are ready.

How would the key new national institutions be set up?

A Scottish Revenue Authority would be established, building on existing Revenue Scotland capacity and taking over collection of formerly reserved taxes. Transitional data-sharing and collection agreements with HMRC would bridge the gap until full systems are ready. An independent Scottish statistical institution would be created (expanding current capabilities) to produce the GDP, fiscal, trade, and demographic data required for government and markets; continuity of data series would be prioritised. A compact, professional foreign service would be launched with priority posts in London, Brussels, Washington, key NATO and trading capitals, and selected other locations; expansion would follow clear national-interest priorities rather than prestige.

The main design choice is to build on existing Scottish capacity where it exists, use transitional cooperation with UK bodies to avoid gaps, prioritise the functions essential to revenue, economic management, and international personality, and phase non-essential scale so quality is not sacrificed for premature size. The main constraints are time, systems and data complexity (especially for tax), dependence on UK cooperation for orderly transfer and dual-running, recruitment of scarce specialist skills, and the absolute requirement that revenue continues to flow, that essential statistics are available, and that Scotland has a functioning diplomatic presence at the moment sovereignty begins. Credibility of tax administration, of official statistics, and of the diplomatic service is treated as a public asset that must be protected from the start.

These three institutions turn fiscal sovereignty, economic credibility, and international personality into operational fact. Without the ability to assess and collect the main taxes, the fiscal framework and public services cannot operate. Without reliable official statistics, government, the independent fiscal institution, the Central Bank, and markets lack the data needed for credible management and pricing. Without a basic diplomatic capacity, recognition, negotiation, and the first phase of external relations cannot be conducted. Each is therefore on or immediately adjacent to the minimum day-one institutional list. A newly independent state that cannot collect revenue, cannot produce the data required for fiscal and market credibility, or lacks a functioning diplomatic presence when sovereignty begins is not ready. Designing these institutions is therefore an exercise in prioritisation under constraint: build on what exists, use transitional cooperation to avoid gaps, limit early scope to essentials, and protect credibility as a public asset.

This section sets out the position. A Scottish Revenue Authority would be built on Revenue Scotland and take over formerly reserved taxes, with transitional HMRC agreements until full systems are ready. An independent Scottish statistical institution would expand current capabilities to produce the data required for government and markets, prioritising continuity of series. A compact, professional diplomatic service would launch with priority posts in London, Brussels, Washington, key NATO and trading capitals, and selected other locations, expanding by national interest rather than prestige. Revenue, data, and diplomacy are stood up as core instruments of statehood—in time, to a standard that works, and without gaps in functions that cannot wait. That is how these key institutions are built.

Current Position and Legal/Institutional Baseline

Revenue Scotland already collects fully devolved taxes under Scottish legislation and operates with existing staff, systems, and compliance capacity. HMRC currently administers the larger share of tax assessment and collection for Scotland — including income tax, corporation tax, VAT, national insurance, and other reserved taxes. HMRC holds the data, systems, and enforcement capacity for those taxes. Official statistics for Scotland are produced within the UK statistical system, with the Scottish Government and related bodies contributing capacity and outputs; a fully independent Scottish statistical institution does not yet exist. Scotland currently exercises diplomatic representation and foreign ministry functions as part of the UK. Scotland has no independent diplomatic service or mission network.

Independence would require a Scottish Revenue Authority capable of assessing and collecting the full range of major taxes, an independent Scottish statistical institution capable of producing the data required for fiscal and economic management and market use, and a compact professional diplomatic service capable of supporting recognition, negotiation, and the first phase of external relations. The institutional baseline includes existing Revenue Scotland capacity as a basis for expansion; residual HMRC administration of formerly reserved taxes; partial statistical capacity within the current system; and no independent diplomatic capacity. The task is to expand Revenue Scotland into a full Scottish Revenue Authority with transitional HMRC agreements protecting revenue flow; to establish an independent statistical institution by expanding current capabilities, protecting statistical independence, and prioritising continuity of series; to launch a compact diplomatic service with priority posts determined by national interest; and to sequence all three against the 18–24 month transition timeline so that revenue, essential data, and basic diplomatic presence are operational when sovereignty begins. International practice in the creation or expansion of revenue authorities, statistical offices, and diplomatic services in newly independent or newly responsible jurisdictions confirms that building on existing capacity, using transitional cooperation, limiting early scope to essentials, and protecting institutional credibility are the operable approaches; creating entirely new bodies without transitional bridges, or expanding to premature global scale, are not.

Mechanism and Delivery

Revenue Scotland already collects fully devolved taxes. Independence requires a Scottish Revenue Authority capable of assessing and collecting the full range of major taxes — including income tax, corporation tax, VAT or its successor, national insurance equivalents, and the remaining taxes that are currently reserved. The existing organisation, staff, and systems form the base; the mandate, scale, and technical capacity expand to match full fiscal sovereignty. Expanding an existing body is lower-risk than creating a new one from nothing. Collection of taxes currently administered by HMRC for Scotland would transfer to the Scottish Revenue Authority. That transfer includes not only legal responsibility but data, systems, compliance functions, and the practical ability to take payment and enforce obligations. It is one of the transition's largest operational tasks. Legislation can transfer legal responsibility; operational readiness requires systems, trained staff, and data that currently sit with HMRC.

Until Scottish systems and staffing are fully ready, transitional data-sharing and collection agreements with HMRC would bridge the gap. Dual-running or agency collection under clear contractual terms would ensure that revenue continues to flow and that taxpayers face continuity rather than confusion. The end-state is full Scottish collection; the path to it prioritises unbroken revenue and service. Transitional agreements are therefore a design requirement, not a residual hope. Without the ability to assess and collect tax, the fiscal framework and public service funding cannot operate. The tax authority is therefore on the minimum day-one institutional list, at least in initial operational form sufficient to protect revenue through the transition. Full maturity of every compliance and systems function can continue to develop; the capacity to assess, collect, and account for the main taxes cannot be absent.

An independent Scottish statistical institution would be established by expanding current capabilities. Its core task is to produce the GDP, fiscal, trade, labour-market, demographic, and other data that government, the independent fiscal institution, the Central Bank, markets, and the public need. Independence of the statistical office — from day-to-day political direction in the production of official statistics — is essential for credibility. A statistical system that is seen as an instrument of short-term political messaging cannot support market confidence or disciplined fiscal management. A newly independent state is judged in part by the quality and timeliness of its economic and fiscal data. Markets pricing Scottish debt, the fiscal institution assessing the medium-term plan, and the government managing the budget all depend on reliable statistics. Building that capacity is not a technical afterthought; it is part of the infrastructure of economic sovereignty. The statistical office therefore belongs on the early institutional priority list.

Where possible, continuity of existing data series would be prioritised so that trends remain interpretable across the independence boundary. Breaks in series are sometimes unavoidable; they should be minimised and clearly explained. Cooperation with the UK statistical system during transition would support that continuity where both sides benefit. Clear communication of any methodological changes is required so that users understand what is comparable and what is not. A statistical capability sufficient for immediate fiscal and economic management is required early. The statistical system can continue to develop—with broader outputs, refined methodologies, and expanded capacity—over the first years of independence. The day-one (or immediate post-day-one) requirement is the data needed for the fiscal rules, the medium-term plan, and market credibility; the full statistical programme is a multi-year build.

A compact, professional foreign service would be launched as part of the new state’s core institutions. Quality and focus would matter more than size. The service would support recognition, negotiation of the independence settlement’s international dimensions, membership of international organisations, trade and security relationships, and consular protection of Scottish citizens abroad. A small, high-quality service concentrated on clear priorities is more useful than a thinly stretched global network created for appearance. Initial missions would be concentrated where national interest is greatest: London (the most important single bilateral relationship); Brussels (engagement with the EU and related institutions as a third country); Washington (relationship with the United States); key NATO and trading capitals aligned with the defence posture and trade priorities; and selected other locations according to clear economic, security, or diaspora priorities. Expansion beyond the priority set would follow demonstrated need and available capacity, not prestige or a desire for a global footprint for its own sake.

The diplomatic service would grow progressively. Core foreign ministry functions and the priority posts are part of day-one or immediate post-day-one readiness; the wider network is phased. Staffing would draw on existing expertise, targeted recruitment, and training. Consular capacity would be built so that citizens are not left without assistance, with transitional cooperation where necessary while Scottish capacity develops. The service is treated as a practical instrument of national interest, not as a platform for symbolic display.

Across all three institutions the same principles apply: build on existing Scottish capacity where it exists; use transitional cooperation with UK bodies to avoid gaps; prioritise functions that are essential to revenue, economic management, and international personality; phase non-essential scale so that quality is not sacrificed for premature size; and protect credibility — of tax administration, of official statistics, and of the diplomatic service — as a public asset. These principles align with the wider day-one institutional standard and the civil service capacity programme. They reject both under-preparation (essential functions missing) and over-ambition (too many bodies created too thinly).

Scottish primary legislation would establish the Scottish Revenue Authority by expanding the mandate, powers, and governance of the existing Revenue Scotland framework (or creating a successor body with clear continuity provisions). The independence settlement legislation would give effect to the transfer of formerly reserved taxes, supported by detailed transfer schemes covering data, systems, and staff. Transitional data-sharing and collection agreements with HMRC would be formal bilateral instruments with defined scope, standards, and end dates. Legislation would establish the independent Scottish statistical institution, embed statistical independence, define the core outputs required for fiscal and economic management, and provide for continuity of series where feasible. Governance arrangements would protect the production of official statistics from day-to-day political direction while remaining accountable for quality and relevance. Legislation would establish the diplomatic service by creating the foreign ministry functions and the legal basis for missions abroad. Accreditation, privileges, and immunities would follow ordinary international practice once recognition is obtained. Priority posts would be opened according to a published plan linked to recognition and the transition timetable. Consular functions would be grounded in the same legal framework, with transitional arrangements for citizen assistance while capacity is built.

Sequencing is driven by the overall 18–24 month transition timeline and by the critical-path status of revenue and of the data needed for fiscal credibility. For the tax authority, early work would map the full tax base, identify systems and data requirements, negotiate transitional agreements with HMRC, expand staffing and training, and establish dual-running or agency arrangements that protect revenue flow. Legal responsibility and operational readiness would be sequenced to ensure continuity for taxpayers. Full systems maturity can continue after Independence Day; the capacity to assess, collect, and account for the main taxes must be present. For the statistical office, early work would define the minimum data set required for the fiscal rules, the medium-term plan, and market use; expand capacity and methodologies; secure cooperation with the UK statistical system for series continuity; and establish the governance that protects independence. The early target is a capability sufficient for immediate management; broader development continues thereafter. For the diplomatic service, early work would establish the core foreign ministry functions, open the priority posts (starting with London), staff and train the initial cadre, and put in place transitional consular arrangements. Expansion of the network would follow demonstrated need and available resources, according to a published priority list. In all three cases, readiness milestones would be published and monitored so that gaps are visible before Independence Day rather than discovered after it.

Continuity Design

Continuity of revenue flow is a design requirement. Transitional data-sharing and collection agreements with HMRC, dual-running or agency collection under clear contractual terms, and early systems and staffing work ensure that the capacity to assess, collect, and account for the main taxes is present from the moment of transfer and that taxpayers face continuity rather than confusion. Continuity of essential official statistics is secured by early definition of the minimum data set required for the fiscal rules, the medium-term plan, and market use, by statutory protection of statistical independence, and by cooperation arrangements that support series continuity where feasible. Continuity of data series across the independence boundary is prioritised so that trends remain interpretable; breaks are minimised and clearly explained. The early opening of priority posts, transitional consular arrangements while Scottish capacity develops, and a compact professional design that concentrates resources where national interest is greatest secure continuity of basic diplomatic and consular capacity. Continuity of institutional credibility — of tax administration, of official statistics, and of the diplomatic service — is treated as a public asset that must be protected from the start through governance, transparency, and operational performance.

The design therefore treats gaps in revenue collection or a collapse in statistical credibility as failures; treats transitional cooperation as a legitimate instrument of continuity rather than a residual hope; and treats the deliberate limitation of early scope and the phasing of non-essential scale as the means of protecting quality. Revenue, data, and diplomacy are stood up as core instruments of statehood—in time, to a standard that works, and without gaps in functions that cannot wait.

Constraints and Trade-offs

Legal constraints

Scottish primary legislation establishes the Scottish Revenue Authority by expanding the mandate, powers, and governance of the existing Revenue Scotland framework (or creating a successor body with clear continuity provisions). The independence settlement legislation gives effect to the transfer of formerly reserved taxes, supported by detailed transfer schemes covering data, systems, and staff. Transitional data-sharing and collection agreements with HMRC are formal bilateral instruments with defined scope, standards, and end dates. Legislation establishes the independent Scottish statistical institution, embeds statistical independence, defines the core outputs required for fiscal and economic management, and provides for continuity of series where feasible. Governance arrangements protect the production of official statistics from day-to-day political direction while remaining accountable for quality and relevance. Legislation establishes the diplomatic service by creating the foreign ministry functions and the legal basis for missions abroad. Accreditation, privileges, and immunities follow ordinary international practice once recognition is obtained. The legal design must ensure revenue capacity from the moment of transfer, protect statistical independence in statute, and allow priority diplomatic posts to open under a published plan. The foundation is Scottish primary legislation plus bilateral transitional instruments for tax and data.

Fiscal constraints

Systems, staffing, transitional agreements, and opening priority posts all have costs. The Scottish budget pays, within the fiscal rules and the opening fiscal position. The costs are real and must be planned for in the medium-term fiscal plan. No one claims a cost-free institutional build. The alternative — weak tax collection, unreliable statistics, or an absent diplomatic presence — would impose higher costs through lost revenue, higher borrowing spreads, and reduced capacity to manage external relations. Under the opening fiscal position, these costs face prioritisation against other claims; the critical-path status of revenue and of the data needed for fiscal credibility supplies the prioritisation rule. Under-estimating systems, specialist recruitment, or transitional agreement costs would leave the essential functions under-delivered.

Operational constraints

Systems and data complexity for the full tax base are high; data, systems, and compliance capacity currently sit with HMRC and must be transferred or replicated under transitional arrangements. Recruitment and training of specialist tax, statistical, and diplomatic staff must occur within the transition window. Dual-running or agency collection for tax is operationally demanding and must be negotiated and tested against clear performance standards. Statistical methodologies and series continuity require cooperation and careful communication of any breaks. Opening priority diplomatic posts requires recognition, accreditation, staffing, and logistical readiness. Operational sequencing that prioritises early mapping of the tax base, negotiation of transitional HMRC agreements, definition of the minimum statistical data set, and opening of the most important diplomatic posts reduces the risk of gaps in revenue, data, or diplomatic presence. Under-estimating systems complexity or specialist recruitment timelines would recreate the discontinuities the design is intended to prevent.

Political constraints

Smooth tax transfer, data-sharing, and statistical continuity depend on UK cooperation and are therefore negotiation priorities. Domestic political management must present building on Revenue Scotland, protecting statistical independence, and launching a compact, priority-driven diplomatic service as strengths of realism; resist both under-preparation of essential functions and over-ambition that produces thin institutions; and clearly communicate that transitional agreements protect continuity rather than signal incomplete sovereignty. Adversarial relations would complicate transitional cooperation; they would not prevent Scotland from legislating and staffing its own institutions unilaterally. Contingency planning includes maximum unilateral preparedness and clear prioritisation of the functions that protect revenue and fiscal credibility. Diplomatic build-out depends more on recognition and resources than on UK consent, though practical cooperation remains useful. Credibility of tax administration, of official statistics, and of the diplomatic service remains a public asset that must be protected when political pressure pushes toward faster or more symbolic outcomes.

Time constraints

The 18–24 month transition timeline drives sequencing. Early work must map the full tax base, identify systems and data requirements, negotiate transitional agreements with HMRC, expand staffing and training, and establish dual-running or agency arrangements that protect revenue flow. Early work must define the minimum statistical data set, expand capacity and methodologies, secure cooperation for series continuity, and establish governance that protects independence. Early work must establish core foreign ministry functions, open priority posts (starting with London), staff and train the initial cadre, and put transitional consular arrangements in place. Publish and monitor readiness milestones so gaps are visible before Independence Day. Delays in transitional tax agreements or systems work create revenue friction; delays in minimum statistical capability create fiscal and market credibility risk; delays in priority diplomatic posts create recognition, negotiation, and consular capacity risk. Sequencing driven by the critical path — revenue and essential data first, priority diplomatic presence early, non-essential scale phased — is the operable path; simultaneous perfection of every function is not.

Consistency with the Wider Framework

The tax authority, statistical office, and diplomatic service sit alongside the day-one institutional list and civil service capacity programme; the fiscal rules, independent fiscal institution, and medium-term fiscal plan; sterlingisation and the Scottish Central Bank; international recognition, WTO accession, and treaty succession; and the overall 18–24 month transition and continuity-first approach. These three institutions turn fiscal sovereignty, economic credibility, and international personality into operational fact. There is no tension with the day-one list: the tax authority is explicitly required; statistical capability sufficient for immediate management is required; basic diplomatic capacity is required. There is no tension with the fiscal framework: the tax authority is the means by which the revenue side of the fiscal rules is operated; the statistical office supplies the data the independent fiscal institution and markets need. There is no tension with the international posture: the diplomatic service is the practical instrument of recognition, negotiation, and external representation. These three institutions are the operational expression of the wider prospectus’s emphasis on realism, sequencing, and protecting essential functions.

The section aligns with the continuity-first approach applied throughout the framework: transitional agreements protect revenue flow; essential data is prioritised; diplomatic presence is concentrated on clear national-interest priorities. It aligns with the partnership model of UK relations through transitional HMRC agreements and statistical cooperation. In every case, the design subordinates premature scale and comprehensive perfection to the functions that cannot wait, and subordinates assumptions of automatic readiness to a published programme with milestones and transitional bridges.

Hardest Critiques and Direct Responses

Feasibility

Standing up a functioning tax authority, a credible statistical capability, and a compact diplomatic service within the transition window is feasible if work starts early, is prioritised against the critical path, and is supported by transitional agreements. Revenue Scotland provides an existing tax base; current statistical capacity provides a base for expansion; diplomatic capacity is built from a small professional core. Feasibility is highest when scope is limited to essentials and transitional cooperation is secured; it falls if the programme tries to perfect every function simultaneously or if cooperation is absent. Feasibility depends on early systems and staffing work for tax, early definition of the minimum statistical set, and early opening of priority diplomatic posts; all are demanding but bounded.

Cost and fiscal burden

Systems, staffing, transitional agreements, and opening priority posts all have costs. The Scottish budget pays, within the fiscal rules and the opening fiscal position. The costs are real and must be planned for in the medium-term fiscal plan. No one claims a cost-free institutional build. The alternative — weak tax collection, unreliable statistics, or an absent diplomatic presence — would impose higher costs through lost revenue, higher borrowing spreads, and reduced capacity to manage external relations. Underestimating systems, specialist recruitment, or transitional agreement costs would leave the essential functions under-delivered. The critical-path status of revenue and of the data needed for fiscal credibility supplies the prioritisation rule when fiscal pressure is acute.

Dependence on agreement

Dependence on the United Kingdom is high for smooth tax transfer, data-sharing, and statistical continuity. Scotland can still establish its own institutions and build systems unilaterally. Full continuity in tax and data is far easier with cooperation. The framework therefore treats transitional agreements as negotiation priorities while preparing maximum unilateral capacity. Diplomatic build-out depends more on recognition and resources than on UK consent, though practical cooperation remains useful. Contingency planning includes clear prioritisation of the functions that protect revenue and fiscal credibility. Unilateral readiness does not compel UK cooperation on transitional tax or statistical arrangements.

Transition risk

Gaps or serious friction in tax collection; breaks or loss of credibility in official statistics; and delayed or inadequate diplomatic and consular capacity are material risks. Mitigation is transitional HMRC agreements and dual-running for tax; early definition of the minimum statistical set and protection of independence; priority-driven opening of the most important posts and transitional consular arrangements. A gap in revenue collection or a collapse in statistical credibility would be design failures; the framework treats their prevention as mandatory. Residual risk of over-ambition producing thin institutions is mitigated by the deliberate limitation of early scope and by the phasing of non-essential scale. Early campaigns, secondments, and prioritising the most critical posts mitigate the residual risk of specialist recruitment shortfalls.

Alternatives (status quo and previous proposals)

Creating an entirely new tax authority without building on Revenue Scotland would discard existing capacity and increase risk; it is rejected. Leaving tax collection under indefinite HMRC delivery without building Scottish capacity would leave fiscal sovereignty incomplete; it is rejected. A maximalist early diplomatic network driven by prestige rather than priority would dilute resources; it is rejected. Building on existing capacity, using transitional cooperation to protect continuity, prioritising the functions essential to revenue, data, and international personality, and phasing non-essential scale is the design that matches the constraints of time, systems complexity, and risk. Trading essential readiness for comprehensive perfection or symbolic scale is rejected as the wrong trade-off.

Political and public credibility

The claim most likely to be called unrealistic is that a full tax authority, a credible statistical office, and a functioning diplomatic service can be ready in time without serious disruption. The precise answer is that the design does not require perfection on day one: the tax authority is built on Revenue Scotland with transitional HMRC arrangements protecting revenue; the statistical office expands current capabilities to deliver the minimum data set required for fiscal and market use; the diplomatic service is deliberately compact and priority-driven, with progressive expansion. Credibility rests on published readiness milestones, visible transitional agreements, protection of statistical independence, and an operational record showing revenue continues, essential data remains available, and priority diplomatic functions are staffed. Readers who prefer entirely new tax bodies without transitional bridges, indefinite residual HMRC delivery, maximalist early diplomatic networks driven by prestige, or assumptions of automatic readiness without a published programme are invited to evaluate the framework on the practical requirements of unbroken revenue, credible data for fiscal and market use, and a functioning diplomatic presence at the moment sovereignty begins.

Position Summarised

A Scottish Revenue Authority would be built on Revenue Scotland and take over formerly reserved taxes, with transitional HMRC agreements until full systems are ready. An independent Scottish statistical institution would expand current capabilities to produce the data required for government and markets, prioritising continuity of series. A compact, professional diplomatic service would launch with priority posts in London, Brussels, Washington, key NATO and trading capitals, and selected other locations, expanding by national interest rather than prestige.

Revenue, data, and diplomacy are stood up as core instruments of statehood—in time, to a working standard, and without gaps in functions that cannot wait. That is how these key institutions are built. Existing capacity is used as the base. Transitional cooperation protects continuity. Early scope is limited to essentials. Non-essential scale is phased. Credibility of tax administration, of official statistics, and of the diplomatic service is protected as a public asset. Scotland prepares maximum unilateral capacity; smooth transitional agreements remain negotiation priorities.

Conclusion

How would the key new national institutions be stood up? A Scottish Revenue Authority would be established by expanding Revenue Scotland, taking over formerly reserved taxes, and using transitional data-sharing and collection agreements with HMRC to protect revenue until full systems are ready. An independent Scottish statistical institution would be created by expanding current capabilities to deliver the GDP, fiscal, trade, and demographic data required for government and markets, prioritising continuity of series. A compact, professional diplomatic service would be launched with priority posts determined by national interest, expanding progressively rather than by prestige.

The design meets the continuity test by protecting revenue flow and essential data through transitional arrangements, and meets the realism test by building on existing capacity and limiting early scope to what is essential. The limit of the claim is clear: full systems maturity, a complete statistical programme, and a wide diplomatic network will not exist on day one; transitional cooperation will be required; specialist recruitment takes time; and success depends on early prioritisation, published milestones, and the disciplined refusal to confuse essential readiness with comprehensive perfection. The next section turns to contingency planning for disruption — the final element of the day-one readiness framework.

This analysis forms part of People’s Future Scotland: The Independence Debate, a non-party framework examining the practical design of independence. Each section is written to withstand professional scrutiny and to prioritise mechanism, constraint and continuity over aspiration.