Autumn Budget 2026: How to Work Out Winners and Losers at £25k, £50k, £100k

Important: this is a framework, not a prediction

Let's be completely clear before going any further. As of 10 July 2026, no Autumn Budget 2026 has taken place. No date has been confirmed, and no rate, threshold or allowance change for the 2026 Autumn Budget has been announced by HM Treasury. Any article claiming to know today exactly which taxes will rise, fall, or freeze in a Budget that hasn't happened is, at best, guessing.

What this article gives you instead is something more durable than a guess: a repeatable method for working out how any Budget measure — whatever it turns out to be, whenever it's announced — will land differently on someone earning £25,000, £50,000 or £100,000. We'll walk through the analytical approach professional bodies like the OBR, IFS and Resolution Foundation use, then apply it to one explicitly hypothetical, clearly-labelled placeholder scenario purely to demonstrate the mechanics. Once the real Budget happens, swap the placeholder numbers for the real ones and the same method still works.

Why "winners and losers" analysis exists

Every Budget changes the tax and benefit system in ways that affect different households unevenly. A change to the basic rate of income tax affects almost everyone who pays tax, but by different cash amounts depending on income. A change to a threshold — the point at which a new rate kicks in — can leave someone just below it completely unaffected while someone just above it feels the full impact. A change to a benefit taper, like the Personal Allowance taper above £100,000 or the High Income Child Benefit Charge, only affects people in a specific income band at all.

This is why credible post-Budget coverage doesn't just report "income tax basic rate held at 20%" — it reports what that means, combined with every other measure in the Budget, for a representative earner at several income levels. That's the exercise we're setting up here, in advance, using placeholder figures.

The standard method, step by step

1. Establish the baseline. Take the current tax year's rates, thresholds and NI rules and calculate net take-home pay for your reference salaries under the rules as they stand today.
2. Read the actual measure. Once a Budget happens, identify precisely what changed: was it a rate, a threshold, an allowance, or a benefit taper? Note the effective date — measures don't always start immediately.
3. Recalculate net pay under the new rules. Apply the same gross salary through the new rates/thresholds to get a new net figure.
4. Compare in cash and percentage terms. The difference between the baseline and the new net figure, in pounds per year and as a percentage of income, is the individual "winner/loser" outcome at that salary level.
5. Repeat across salary levels. Because thresholds bite at specific income points, the same measure can produce very different outcomes at £25k, £50k and £100k — which is exactly why analysts always show a range, not a single average figure.
6. Cross-check against distributional decile analysis from the OBR, IFS or Resolution Foundation, which apply this same logic across the whole income distribution using real household data, not just three reference points.

Illustrative example — NOT a prediction

To make the method concrete, here is a purely hypothetical scenario, invented for this article only, with no basis in any announced or leaked policy. Suppose — for illustration only, not a prediction — that a future Budget extended a freeze on the basic-rate threshold for one further year instead of letting it rise with inflation. We are not saying this will happen; we are using it because a threshold freeze is a simple, well-understood mechanism to demonstrate how the same lever affects three salaries differently. Once real measures are confirmed, we will replace this section with actual figures and a real recalculation.

Under this illustrative, invented-for-demonstration freeze, more income sits inside each existing band than it would if the threshold had risen with wages, so effective tax as a share of income edges up slightly for anyone whose pay also rises — with the size of the effect depending on how much of their income sits near the frozen boundary.

Illustrative example only — hypothetical impact by salary (not real Budget figures)

Again: the "direction of effect" column above is a mechanical illustration of how thresholds interact with salary levels, not a statement that tax will rise for anyone in 2026. No rate or threshold change has been announced. The table exists to show how to reason about winners and losers, using a clearly hypothetical mechanism as the example.

Why £25k, £50k and £100k respond differently in principle

These three salary levels aren't arbitrary — they sit on either side of structurally important points in the UK tax and NI system, which is precisely why the same Budget measure can be a non-event for one and a meaningful shift for another:

• £25,000 — comfortably within the basic-rate band, with the Personal Allowance covering a meaningful share of income. A measure targeted at the Personal Allowance itself has a proportionally larger effect here than a measure targeted at a higher threshold.
• £50,000 — sits right around the higher-rate threshold (currently £50,270) and the point where the High Income Child Benefit Charge begins to apply for households receiving Child Benefit. Earners here are unusually exposed to small threshold movements because a shift of even a few hundred pounds can change which band their marginal pound falls into.
• £100,000 — sits at the start of the Personal Allowance taper, where the Personal Allowance withdraws at £1 for every £2 earned above the threshold, producing an effective marginal rate around 60% under current rules. Any Budget measure touching the taper start point, the taper rate, or the Personal Allowance value itself has an outsized effect here compared with earners well below or well above this band.

Your Budget-day checklist

When the real Autumn Budget 2026 is delivered, work through this in order:

1. Note the date the measure takes effect — some start immediately, others from the next tax year (6 April).
2. Identify the exact mechanism — is it a rate change, a threshold freeze/change, an allowance change, or a benefit taper adjustment?
3. Get your current baseline net pay using this tax year's rules in the take-home pay calculator.
4. Recalculate with the confirmed new rules once they're published or once the calculator is updated to reflect them.
5. Compare cash and percentage difference — don't rely on the headline rate alone; check where your salary sits relative to any changed threshold.
6. Check decile-level analysis from the OBR, IFS or Resolution Foundation to see where your outcome sits relative to the wider income distribution, not just your own three data points.
7. Re-run the comparison for £25k, £50k and £100k reference salaries (or your own actual income) to see the shape of the impact across income levels, exactly as illustrated conceptually above — but now with real numbers.

What we'll publish once the real Budget happens

As soon as the Chancellor delivers the actual Autumn Budget 2026 and the specific measures are confirmed, we will publish a follow-up article replacing every hypothetical figure in this piece with real, recalculated numbers for £25,000, £50,000 and £100,000 earners, cross-checked against OBR and IFS distributional analysis. Until then, treat this article as the method, not the answer.

Sources

• Office for Budget Responsibility — Economic and Fiscal Outlook publications: obr.uk
• Institute for Fiscal Studies — independent Budget analysis: ifs.org.uk
• Resolution Foundation — living standards and distributional analysis: resolutionfoundation.org
• HM Treasury / gov.uk — official Budget documents and policy costings: gov.uk/government/organisations/hm-treasury
• HMRC — current Income Tax rates and Personal Allowance: gov.uk/income-tax-rates