Two-Year Salary Comparison
A pay rise on paper is not automatically the same as a genuine improvement in your real financial position — checking your actual salary from an earlier year against your current one, run through both years’ genuine tax rules, reveals whether a specific rise has truly delivered what its headline percentage suggests. This calculator works out your take-home pay under an earlier tax year’s rules compared with current 2026/27 rates, worth checking whenever a rise has happened rather than assuming the headline percentage tells the full story on its own.
2025/26 vs 2026/27 Tax Comparison
Compare your take-home pay between the 2025/26 and 2026/27 tax years.
The Two-Step Way to Check a Genuine Pay Rise
This calculator compares one salary figure across two years, so checking a genuine pay rise between two different salaries takes two separate runs: enter your old salary with your old year selected to see what it was genuinely worth then, then enter your new, current salary with the same earlier year selected to see what an equivalent salary is worth under current rules. Comparing the two take-home figures this produces — not the two gross figures — gives the real, honest answer to whether a specific pay rise has genuinely improved your financial position.
This two-step approach genuinely takes only a couple of minutes and gives a considerably more honest answer than mentally estimating the effect of a rise — particularly given how unevenly a rise’s real value can vary depending on where it lands relative to tax band thresholds.
Seeing a Genuine Pay Rise Checked Properly
Someone earning £42,000 in 2023/24 took home roughly £33,760 that year. The same person now earning £48,000 — a genuine £6,000, 14.3% gross rise — takes home roughly £38,080 under current rules, a real net increase of around £4,320, or roughly 12.8% in take-home terms. The net percentage increase is slightly smaller than the gross percentage, which is expected and normal as more income moves through the tax system, but the rise has still delivered a genuine, meaningful real improvement in this case — not every pay rise does once properly checked this way.
Running your own genuine numbers through this same two-step process, rather than assuming your situation mirrors this example, is worth doing directly — the specific gap between gross and net percentage increase varies depending on exactly where your old and new salaries sit relative to tax band thresholds.
Why Higher Earners Need This Checked Especially Carefully
For income above £100,000, where the Personal Allowance tapers away, it is worth confirming a year comparison correctly applies this same taper consistently to both years being compared — an inconsistency here can make an identical salary look like it has genuinely changed in tax terms between two years when it genuinely has not, purely from a calculation quirk rather than any real policy change. A £115,000 salary, for example, should show no change at all between 2025/26 and 2026/27 once the Personal Allowance taper is applied consistently to both years, since the underlying rest-of-UK rates and thresholds affecting this income level have not moved.
This is precisely the kind of detail worth being confident about before drawing a conclusion from a year comparison at this income level — an apparent change that turns out to be a calculation artifact rather than a genuine policy effect could otherwise lead to a mistaken sense of how the tax system has actually treated a specific salary over time.
Making This Genuinely Useful for a Real Decision
Beyond satisfying curiosity, this two-step comparison is genuinely useful evidence in a salary negotiation — showing that a proposed rise, once properly checked against real take-home figures rather than headline gross percentages, does or does not deliver what it appears to on paper. Bringing genuine net figures into a negotiation conversation, rather than relying on the gross percentage alone, gives a considerably more precise, defensible basis for assessing whether a specific offer genuinely meets your real financial goal. Our Tax Year Comparison Calculator covers the related question of how an unchanged salary’s take-home has shifted purely from tax system changes, and our Income Tax Calculator is useful for a full, detailed breakdown of either specific salary figure on its own.
Frequently Asked Questions
Does this account for inflation when checking a genuine pay rise?
No — it compares nominal take-home pay under each year’s tax rules, which reveals the tax system’s own effect specifically; separately checking the result against inflation over the same period gives the fullest, most honest picture of whether a rise has genuinely improved your real purchasing power.
Should I use my gross or net old salary for the comparison?
Use your gross salary figure for both runs — this calculator applies the correct tax and NI itself for each year selected, so entering a net figure would produce an inaccurate result.
Does this work if I changed jobs between the two years?
Yes — the calculation is based purely on the salary figures and years you enter, regardless of whether they represent the same job with a rise or two entirely different roles.
Why might my real payslip history show a different figure than this calculator?
Changes to pension contributions, benefits, student loan repayments or your specific tax code between the two years can all affect your real historical take-home beyond what this calculator’s standard Income Tax and NI comparison captures.
Is a smaller percentage pay rise sometimes genuinely worth more than a larger one?
Yes, potentially — this depends heavily on where each salary sits relative to tax band thresholds, which is precisely why checking the genuine net figures for your own specific numbers matters more than comparing headline percentages alone.
Important Information
This calculator provides an estimate based on published historical and current 2026/27 tax rates for general information purposes only and does not constitute tax or financial advice. See our Disclaimer for further information.