Fiscal Drag:
The Stealth Tax
How frozen income tax thresholds silently erode your real take-home pay as wages rise with inflation.
What is Fiscal Drag?
Fiscal drag occurs when income tax thresholds are frozen — or simply fail to keep pace with inflation. As nominal wages rise, workers are pushed into higher tax bands even though their real purchasing power has not increased. The government collects more revenue without Parliament ever voting to raise tax rates.
The UK Context: 2021–2028
The UK government froze income tax thresholds in 2021, originally until 2026. That freeze has continued to 2028, with the personal allowance locked at £12,570 and the basic rate threshold at £50,270 throughout.
The UK Income Tax Bands (2024/25 — Frozen)
| Band | Rate | Annual Income |
|---|---|---|
| Personal Allowance | 0% | Up to £12,570 |
| Basic Rate | 20% | £12,571 – £50,270 |
| Higher Rate | 40% | £50,271 – £125,140 |
| Additional Rate | 45% | Over £125,140 |
How Does It Work?
- Year 1: Salary = £30,000. You pay basic rate tax (20%) on income above the personal allowance.
- Year 2: Inflation = 5%. Your employer raises your salary to £31,500. But tax thresholds are unchanged.
- Result: A larger slice of your income is now taxable. Your nominal salary rose, but your real take-home pay may have fallen.
- Compounding: Repeat this over 5–7 years and the cumulative effect is substantial — this is the stealth in the stealth tax.
Why It's Controversial
- Invisible: Gross salary goes up, so workers don't immediately notice the higher tax burden.
- Regressive in effect: Middle earners pushed into higher bands face a sudden jump from 20% to 40% marginal rates.
- Politically convenient: Government raises revenue without the political cost of announcing a tax rise.
- Disproportionate: Those earning £30,000–£60,000 experience the largest proportional increase in tax burden.
- Work disincentives: Higher marginal rates may discourage career progression or additional hours.
The Debate
✓ Arguments For Freezing
- Raises revenue without explicit tax rate increases
- Helps reduce government deficit and debt-to-GDP
- Provides fiscal space for public service spending
- Maintains rate stability for business planning
✗ Arguments Against Freezing
- An opaque and unfair "hidden" tax rise
- Erodes real wages during a cost-of-living crisis
- Disproportionately burdens low and middle earners
- Reduces disposable income and consumer spending
'FROZEN AGAIN': CHANCELLOR EXTENDS INCOME TAX THRESHOLD FREEZE TO 2028
The Chancellor confirmed yesterday that income tax thresholds will remain frozen at their current levels until at least 2028, extending a policy first introduced in 2021 that critics have branded a "stealth tax" on working people.
The personal allowance — the amount workers can earn before paying income tax — will stay at £12,570, while the basic rate threshold remains at £50,270. With wages rising with inflation, millions of workers will automatically be pushed into paying more tax, or crossing into higher tax bands, without a single vote in Parliament to raise rates.
The Office for Budget Responsibility estimates the freeze will raise an additional £29 billion per year by 2025/26 compared to if thresholds had risen with inflation — a cumulative total of over £100 billion across the freeze period.
📐 Step-by-Step Calculation Guide
Watch: Fiscal Drag Explained
This short video breaks down how frozen tax thresholds create a stealth tax on UK workers — accessible, concise, and perfect for pre-lesson viewing or flipped learning.
Key Discussion Questions
- Why might a government prefer fiscal drag to an explicit tax rate increase?
- Is fiscal drag fairer or less fair than raising income tax rates? Justify your answer.
- How does fiscal drag interact with automatic stabilisers during a recession?
- To what extent does fiscal drag reduce the incentive to seek higher-paid employment?
- Should tax thresholds be automatically indexed to inflation? Evaluate the arguments.