22nd February 2026
A common starting point in discussions about Scottish independence is a seemingly narrow technical question. How much more expensive is it to run two tax offices — one in England and one in Scotland — compared with a single, combined system?
At first glance this can look like a minor administrative issue. In reality, it opens the door to a much larger and more important question: what are the true costs of separating a small state from a much larger fiscal system, and who currently benefits from that system?
This article follows that logic from the ground up — from tax administration, to state capacity, to redistribution, and finally to the unavoidable question of taxes.
1. The current situation: one system, partially devolved
At present, the UK operates a largely unified tax system.
HM Revenue & Customs collects and administers the vast majority of taxes across the UK.
Scotland has a separate body, Revenue Scotland, but it only administers a small number of fully devolved taxes.
Scottish income tax rates and bands are set in Scotland, but HMRC still collects the tax, with Scotland reimbursing HMRC for the additional administrative cost.
This means Scotland already has partial duplication, but not full separation.
2. How much extra does this partial duplication cost?
The answer is: not very much — precisely because Scotland is not running a full standalone tax system.
Revenue Scotland's annual operating budget is around £12 million
The incremental cost charged by HMRC for administering Scottish income tax is well under £1 million per year
Against HMRC's total UK-wide running cost (over £4 billion annually), these sums are tiny. That is because:
Core IT systems remain UK-wide
Enforcement, compliance, data, and payment systems are shared
Scotland benefits from UK economies of scale
So running two partially separate tax bodies costs only a little more than one, because the expensive parts are still shared.
3. Why this does not scale to independence
This is where the misunderstanding often arises.
People sometimes assume that because partial devolution is cheap, full independence would also be cheap. That is not how public administration works.
In an independence scenario, Scotland would need to:
Build a fully independent tax authority
Create its own customs system
Run its own VAT regime
Build entirely new IT platforms
Replicate compliance, fraud, analytics, legal, and enforcement functions
The biggest cost here is not staff — it is large-scale national IT systems, which routinely cost hundreds of millions of pounds each in public-sector environments.
The tax office is just one example. The same logic applies to:
Social security and pensions
Border and immigration systems
Vehicle and licensing databases
Major regulators
Defence procurement and intelligence coordination
The result is:
Large one-off setup costs (several billions over the first decade)
Permanently higher running costs due to loss of scale
4. Comparing Scotland with similar-sized independent countries
Scotland is often compared to countries of similar population size:
Ireland
Denmark
New Zealand
These countries show that small states can function perfectly well — but they also show that choices matter.
Denmark sustains a large welfare state through very high taxes
Ireland sustains lower taxes by attracting exceptional corporate revenues
New Zealand runs more modest public spending
What none of these countries have is access to a larger neighbouring tax base that automatically fills fiscal gaps.
Scotland currently does.
5. The Barnett Formula and what Scotland would lose
A crucial but often misunderstood mechanism is the Barnett Formula, administered by HM Treasury.
In simple terms:
When spending rises in England on devolved services
Scotland receives a population-based share of that increase
Over time, this contributes to a situation where:
Public spending per person in Scotland is around £1,500-£1,700 higher than in England
That difference amounts to roughly £8-10 billion per year
On independence:
Barnett consequentials go to zero
There is no replacement mechanism
The gap must be closed domestically
This is not a one-off loss. It is every year.
6. Where the money really comes from: the South East
The UK does not generate tax evenly across regions.
London and the South East England:
Have much higher incomes
Generate far more corporation tax
Contribute disproportionately to capital gains and VAT
Tax raised per head:
London: £12,500-£13,500
South East: £10,500-£11,500
Scotland: £9,000-£9,600 (including oil)
Spending per head:
Scotland: ~£12,000–£12,300
England average: ~£10,500
The difference is covered by UK-wide pooling.
Put bluntly:
Taxes paid by richer parts of England subsidise public services in Scotland.
This is not unique to Scotland — most UK regions are net beneficiaries — but Scotland is one of the largest in cash terms.
7. How big is the net transfer?
Combining tax and spending figures gives a clear result:
Per-person gap: £1,600–£2,000
Population: ~5.5 million
Total net transfer: £8–10 billion per year
This is the amount Scotland would need to replace to maintain current services after independence.
8. Would England be better off without this transfer?
Not in any meaningful way for most people.
Spread across England's population, the "saving" would be about £160 per person per year, before accounting for:
Economic disruption
Loss of scale
New border and defence costs
Higher borrowing costs for a smaller UK
Redistribution within England would continue anyway — London would still subsidise poorer English regions.
The financial impact is asymmetric:
Scotland loses a large, visible fiscal cushion
England gains only marginally, and unevenly
9. Turning £8–10 billion into real tax rises
Abstract billions can sound manageable. Concrete taxes do not.
To replace £8–10bn annually, Scotland would need combinations such as:
Income tax:
+1p ≈ £550–600m
→ +14–18p on all bands to cover the full gap alone
VAT:
+1% ≈ £550–600m
→ VAT rising from 20% to mid-30s to fill the gap alone
National Insurance:
+1% ≈ £900m–1bn
→ Still only covers part of the gap
Corporation tax, wealth, and property taxes:
Helpful, but nowhere near sufficient on their own
A realistic solution would involve everyone paying more — workers, consumers, and businesses — or accepting lower public spending, or both.
10. The central trade-off
None of this proves Scotland cannot be independent.
What it does show is the trade-off:
The UK is cheaper to run because of scale
Scotland benefits from pooled taxes, especially from the South East
Independence means greater autonomy, but less fiscal shelter
The question is not whether independence is possible.
It is whether voters are willing to accept:
Higher taxes
Lower spending
Or a leaner state during a long transition
Final thought
The question "how much more expensive is it to run two tax offices?" sounds technical, but it leads to a much deeper truth:
Scotland is not just sharing administration with the UK — it is sharing wealth.
Ending that sharing changes the numbers fundamentally, not rhetorically.
Barnet Formula explanation at Wikipedia