UK workers faced the steepest rise in tax burden among OECD nations in 2025, with the tax wedge increasing by 1.2 percentage points to 31.3%, driven by frozen income tax thresholds and rising National Insurance contributions, according to the OECD’s Taxing Wages 2026 report published April 2026.
The Bottom Line
- UK tax wedge growth of 1.2 pp in 2025 was the highest in the OECD, reducing real take-home pay despite nominal wage gains.
- Fiscal drag from frozen thresholds could suppress consumer spending by 0.4–0.6% YoY in 2026, per NIESR estimates.
- Corporate profit margins may face pressure as wage growth lags inflation, potentially affecting FTSE 100 earnings forecasts.
How Fiscal Drag Is Silently Eroding UK Household Budgets
The OECD’s Taxing Wages 2026 report reveals that the UK’s tax wedge—the combined effect of income tax and employee social security contributions less benefits, as a share of labour costs—rose to 31.3% in 2025 from 30.1% in 2024, the largest increase among 38 OECD members. This surge was primarily due to the continued freezing of personal income tax thresholds at £12,570 and the higher rate threshold at £50,270, a policy in place since April 2022. With average wages growing at 4.1% in 2025 per ONS data, fiscal drag pulled an estimated £1,200 annually from the average worker’s real income, according to the Institute for Fiscal Studies (IFS). Meanwhile, employer National Insurance contributions rose to 13.8% in April 2025 from 13.5%, adding further pressure on labour costs. The combined effect has reduced disposable income growth, with real household disposable income per capita rising just 0.8% in 2025, the slowest pace since 2020, per ONS.
The Ripple Effect on Consumer-Facing Sectors and Inflation Dynamics
Higher tax wedges directly constrain consumer spending power, particularly in discretionary sectors. Retail sales volumes grew only 1.2% in 2025, the weakest annual pace since 2009 excluding pandemic years, according to the British Retail Consortium (BRC). Companies like **Tesco (LON: TSCO)** and **Next (LON: NXT)** have cited weakening demand in non-food segments, with Tesco reporting a 0.5% decline in general merchandise sales in Q4 2025. Meanwhile, persistent wage growth—average weekly earnings rose 5.6% in the three months to February 2026—has kept services inflation sticky at 5.0%, above the Bank of England’s 2% target. This creates a policy dilemma: fiscal drag suppresses demand, but tight labour markets sustain price pressures. As Jonathan Haskel, external member of the Bank of England’s MPC, noted in a March 2026 speech, “We are seeing a bifurcation where income tax drag hits household budgets, yet wage growth in services keeps inflation elevated.”
Corporate Margin Pressure and the Wage-Productivity Gap
For businesses, rising employer NICs and stagnant real wage growth are compressing margins, especially in labour-intensive industries. The UK’s productivity output per hour worked grew just 0.3% in 2025, the slowest rate in a decade, per ONS. Unit labour costs rose 4.8% in 2025, outpacing productivity gains and squeezing profitability. In the FTSE 350, EBITDA margins averaged 14.2% in 2025, down from 15.1% in 2024, according to Refinitiv data. Industrials and consumer staples saw the steepest declines, with EBITDA margins falling 1.3 and 1.1 percentage points respectively. As Stuart Rose, former CEO of **Marks & Spencer (LON: MKS)** and current chair of the UK Productivity Council, stated in a February 2026 interview with the Financial Times, “Businesses are absorbing higher employment costs without commensurate gains in output. Until we address productivity, tax policy will continue to act as a headwind on both wages and profits.”
Comparative Context: How the UK Stacks Against Peers
| Country | Tax Wedge 2024 (%) | Tax Wedge 2025 (%) | Change (pp) | Real Wage Growth 2025 (%) |
|---|---|---|---|---|
| United Kingdom | 30.1 | 31.3 | +1.2 | +0.8 |
| Austria | 47.2 | 47.5 | +0.3 | +1.1 |
| Germany | 49.4 | 49.6 | +0.2 | +0.9 |
| United States | 29.8 | 30.0 | +0.2 | +1.5 |
| France | 47.6 | 47.8 | +0.2 | +0.6 |
Source: OECD Taxing Wages 2026, ONS, Refinitiv. Note: Tax wedge refers to single average worker without children. While the UK’s absolute tax wedge remains below the OECD average of 34.6%, its year-on-year increase was the largest. In contrast, Austria’s tax wedge rose only 0.3 pp despite starting from a much higher base, reflecting indexed tax brackets. The UK’s policy of fiscal drag—freezing thresholds amid inflation—has uniquely amplified the burden on median earners. This divergence helps explain why UK consumer confidence, at -18 in Q1 2026 per GfK, lags behind the Eurozone average of -12, despite similar inflation rates.
The Path Forward: Policy Trade-Offs and Market Implications
Looking ahead, the UK government faces a choice: maintain fiscal consolidation through threshold freezes, risking further erosion of real incomes and consumer demand, or adjust thresholds to mitigate fiscal drag, potentially increasing borrowing costs. The Office for Budget Responsibility (OBR) estimates that raising thresholds in line with inflation in 2026–27 would reduce receipts by £18 billion but boost real disposable income by 1.2%. Financial markets are already pricing in prolonged stagnation, with the FTSE 250 trading at a forward P/E of 9.8, well below its 10-year average of 13.5, reflecting low growth expectations. As Adam Posen, former BOE MPC member and president of the Peterson Institute for International Economics, warned in a Brookings Institution panel in April 2026, “The UK is experimenting with austerity by stealth. Without productivity growth or tax base expansion, this approach risks entrenching stagnation.”
*Disclaimer: The information provided in this article is for educational and informational purposes only and does not constitute financial advice.*
