The claim: Immigrants pay more in tax than they cost.

Misuse

contested, method-dependent estimate stated as settled fact

Direction

pro-migration

What the data says

There is no agreed figure for the net fiscal impact of immigration. Across the pre-Brexit static studies summarised by the Migration Observatory, the estimated net impact of the migrant population is small in magnitude, under 1% of GDP, and comes out positive in some studies and negative in others.

Those are separate studies of different migrant groups, periods and methods, not one estimate with an uncertainty band. And none covers the whole post-Brexit immigration system. So the honest summary is that the effect is small relative to the economy, and that no single figure supports a confident claim in either direction.

One figure sometimes quoted in support of this claim comes from an Office for Budget Responsibility chart, corrected in November 2024: a representative migrant arriving at 25 on the average wage, modelled as a lone individual with no dependants, is a lifetime net contributor. OBR prints no single value and singles out no endpoint age, and the chart runs to age 100. The roughly £297,000 here is this site's own reading of that chart at age 82, chosen because that is the life expectancy OBR's own text gives an average person in 2028. It is an illustration, not a number OBR itself prints, it describes one hypothetical individual, and the age is doing much of the arithmetic: stop at a different one and the figure moves by a large margin, and before the chart ends it changes sign. The same OBR analysis finds a migrant on low earnings has a negative lifetime impact, and one on high earnings a considerably larger positive one. It shows how sensitive the answer is to circumstances; it is not an average.

Why the claim is misleading

It converts a contested, assumption-dependent estimate into a settled fact, by picking the most favourable number available and presenting a single illustrative case as though it were typical.

Three things drive the disagreement between studies, and none is resolved by citing a bigger number:

• Snapshot or lifetime. Static studies compare taxes paid and services used in a single year. Dynamic studies follow a cohort across a lifetime, including the years before earnings peak and after retirement. Dynamic studies can produce different answers and require additional assumptions about future earnings, policies and length of stay.
• Which costs count. Whether you attribute a share of defence, debt interest and other collective spending to migrants changes the result substantially, and there is no neutral answer to that question.
• Who leaves, and when. Assumptions about return migration have a large effect on lifetime estimates. Historical departure data exist; a study has to project future behaviour.

The aggregate also hides substantial differences behind a single average. Fiscal contribution depends on age at arrival, earnings, family composition and length of stay, so one figure covering everyone who has ever migrated to the UK conceals more than it reports.

The mirror claim fails the same test

"Immigrants are a drain on the public finances" is wrong for exactly the same reason, and this site treats it no differently. Both take a small, mixed body of evidence and report one end of it as the answer. If the evidence cannot support "more in than out", it cannot support "a net drain" either.

What this is not about

The net fiscal impact of immigration is a different question from what a particular part of the system spends. UK government spending on the asylum system was an estimated £4.9 billion in financial year 2024-25, on the National Audit Office's analysis of actual costs. It is a reasonably firm figure for that system, but the NAO notes it excludes some costs, particularly those falling on local authorities.

The two get conflated constantly, in both directions. A spending total tells you what a system costs to run. It does not tell you the net fiscal position of migrants generally, and it is not evidence for or against this claim.

Better questions to ask

• Which migrants, arriving at what age, earning what, staying how long?
• Is this a snapshot of one year or a projection across a lifetime?
• Which costs has the study attributed to migrants, and which has it left out?
• Is the figure quoted an average, or one illustrative case?

Source notes

Evidence across studies: as summarised in the Migration Observatory's fiscal impact briefing, published June 2026, drawing on pre-Brexit static studies. Recorded in the data layer as an explicit range rather than a point estimate, so it cannot be rendered as a single number, and none of the underlying studies covers the current post-Brexit system.

Lifetime contribution scenario: Office for Budget Responsibility, September 2024. A projection for a hypothetical individual, not an observed outcome.

Asylum system spending: National Audit Office, financial year 2024-25. An NAO estimate based on actual costs, covering the Home Office and Ministry of Justice only, so it understates the full system cost, particularly costs falling on local authorities.

This is the most contested area covered by this site. This site presents every figure here with its method and its source attached, never as a settled fact.

All common claims