UK Pay Rise Calculator 2026/27

Compute the actual after-tax increase from a UK salary rise. A 10% pay rise does not give you a 10% increase in take-home - part of every marginal pound goes to Income Tax and NI, and the effective rate depends on which band the rise lands in. The trap to watch: pay rises that cross the £100,000 line lose 62p per £1 to the Personal Allowance taper.

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Worked examples (2026/27, England)

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Frequently asked questions

How much of a UK pay rise do I actually keep?
Depends entirely on where your current salary and the rise sit relative to the tax band thresholds. A pay rise fully inside the basic-rate band (£12,570 to £50,270) keeps 72p per £1 raised after 20% IT + 8% NI. A rise fully inside the higher-rate band (£50,270 to £100,000) keeps 58p per £1 after 40% IT + 2% NI. A rise inside the £100,000-£125,140 Personal Allowance taper keeps only 38p per £1 - the highest effective marginal rate in the UK income-tax structure.
What is the effective tax rate on a pay rise?
The effective tax rate on a pay rise is the IT and NI taken from each marginal pound of the rise. It is the headline marginal rate where the rise lands (28%, 42%, or 47%) unless the rise spans a threshold, in which case it is a weighted blend across the bands. The calculator computes the exact figure for your inputs.
Why does my pay rise feel smaller than expected?
Two common reasons: (1) the rise crossed a band threshold so part of it is taxed at the next higher rate, and (2) PAYE may have used a cumulative method that estimated a full-year salary from the new monthly figure and over-withheld. The latter usually self-corrects across the remaining months.
Should I salary-sacrifice a pay rise into pension?
It is worth considering, especially if the rise pushes you into the £100k PA-taper band (62% effective marginal). Sacrificing the marginal pounds keeps the full uplift in your pension pot at zero Income Tax cost, vs receiving 38p per £1 as cash. The trade-off is liquidity - pension money is locked until age 57 (rising to 58 in 2028).
Does the rise affect my pension contribution amount?
If your pension is a fixed percentage of salary (common workplace schemes), the contribution automatically goes up with the rise. If your contribution is a fixed pound amount or you cap it, only the rise less your existing contribution increases. The pension uplift gets full tax relief at the marginal rate, often making the after-pension take-home delta smaller but the total comp delta larger.

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