Fiscal Drag

What Is Fiscal Drag?

Fiscal drag — also called bracket creep or tax bracket creep — is the automatic increase in tax revenue that occurs when inflation pushes wages into higher income tax brackets, even though the real (inflation-adjusted) purchasing power of those wages has not increased.

In a progressive tax system, if tax brackets are not adjusted for inflation each year, workers who receive only cost-of-living pay rises find themselves paying a larger share of their income in tax, simply because their nominal salary has grown. Their real living standards may be unchanged, but their tax burden rises.

Fiscal drag is sometimes called a stealth tax because it raises the government’s tax take without Parliament or Congress voting for a specific tax increase.

How Fiscal Drag Works: A Simple Example

Suppose in Year 1:

• Worker earns £40,000
• Tax bracket threshold: £37,700 (basic rate)
• The worker is in the basic rate (20%) band for most of their income

In Year 3, after 8% inflation (2 years × ~4%):

• Wages rise with inflation to £43,200
• Tax bracket still at £37,700 (frozen)
• A larger portion of income now falls into the higher rate band (40%)

The worker’s real purchasing power is unchanged, but they now pay 40% on a larger slice — their effective tax rate has risen without any legislative act.

The UK: The Largest Fiscal Drag in Decades

The UK government froze income tax thresholds from April 2022 through April 2028 — a full six years of frozen thresholds despite elevated inflation (peaking at 11.1% in 2022):

Thresholds frozen at:

• Personal Allowance: £12,570
• Basic Rate / NI Primary Threshold: £12,570
• Higher Rate Threshold: £50,270

With cumulative wage growth of roughly 25%+ over the freeze period, the Institute for Fiscal Studies estimated this would drag an additional 3–4 million people into income tax for the first time, and another 1–2 million from basic to higher rate, by 2028.

The effective tax rises from this single policy decision dwarf many explicit tax increases. It was structured as a threshold freeze rather than a tax rise — politically easier, but economically equivalent.

Indexation: Preventing Fiscal Drag

Most countries adjust tax brackets annually for inflation to prevent fiscal drag:

United States: Brackets, the standard deduction, and most thresholds are indexed to the Chained CPI-U (C-CPI-U). The IRS announces adjusted amounts each October for the following year. This means the US system generally prevents fiscal drag automatically — bracket thresholds move with inflation.

Canada: The basic personal amount and federal brackets are indexed to CPI annually, largely preventing fiscal drag at the federal level. Provincial indexation varies.

Australia: The ATO adjusts PAYG withholding tax tables but income tax brackets are not automatically indexed by legislation — they require explicit budget measures. Australia has had periods of significant fiscal drag when brackets went unchanged for years.

India: India does not automatically index tax slabs. Slab revisions require explicit budget announcements. When slabs are not changed for several years (as happened 2012–2017 with the old regime), fiscal drag accumulates, particularly for middle-income earners.

New Zealand: NZ adjusts the bottom bracket threshold periodically but not automatically or annually. Fiscal drag accumulates between adjustment events.

Fiscal Drag’s Impact on Different Income Levels

Fiscal drag affects workers across the income distribution differently:

Low earners near the personal allowance threshold: As nominal wages rise, some workers cross into the taxable band for the first time — losing complete tax freedom on marginal earnings.

Middle earners near the higher-rate threshold: Workers who previously paid 20% (UK basic) or 22% (US mid-bracket) can be dragged into 40% or 24% bands, significantly increasing their effective rates.

Very high earners: Usually in the top bracket already — fiscal drag has less effect unless new thresholds are crossed (e.g., the UK’s £100,000 personal allowance taper).

Fiscal Drag as Government Revenue Strategy

Governments sometimes deliberately choose not to index thresholds — using fiscal drag as a revenue tool without the political cost of an explicit tax rise. The revenue gain can be substantial:

The UK Office for Budget Responsibility estimated the 2022–2028 threshold freeze would generate approximately £45 billion in additional annual revenue by 2027-28 — one of the largest tax rises in recent UK history, enacted through inaction rather than legislation.

Countering Fiscal Drag

As an individual, fiscal drag is difficult to avoid directly — you pay the brackets that apply to your nominal income. However, strategies that reduce taxable income help:

• Pension contributions: Reduce nominal taxable income back below key thresholds (UK: staying below £50,270 or £100,000; India: 80C deductions)
• Salary sacrifice: Converts gross pay into non-cash benefits, reducing the income subject to brackets
• Tax-advantaged accounts: ISAs (UK), TFSAs (Canada), Roth IRAs (US) — gains and income inside these wrappers do not count toward taxable income

Key Takeaway

Fiscal drag is a silent tax rise built into frozen bracket systems. When thresholds do not keep pace with inflation, workers pay more tax in real terms without any legislated increase. The UK’s 2022–2028 threshold freeze is the most prominent current example — by 2028, it will have increased the UK income tax burden by more than most explicit tax rises of recent decades. Countries like the US that auto-index brackets largely avoid this phenomenon.