The short answer
On £100,000 gross (England/Wales/NI, 2025/26, no pension/loan), estimated take-home is about £68,557 a year (~£5,713 / month). Tax + NI bite ≈ £31,443 — you keep roughly 69%.
Full breakdown
- Gross pay: £100,000
- Income Tax: £27,432
- National Insurance: £4,011
- Estimated net: £68,557
Personal allowance taper (why £100k+ hurts)
Above £100,000 of adjusted net income, your personal allowance is reduced by £1 for every £2 over the threshold, until it hits zero. That creates an effective high marginal rate band between £100k and ~£125k — often why a “small raise” feels strangely expensive.
At exactly £100,000 you’re at the edge. Nudge the salary upward in TaxBite (or use the What-If slider) to watch the bite climb faster than intuition suggests.
Scotland check
Same £100k in Scotland typically keeps less after Income Tax (NI is UK-wide). In our model: ~£5,435 / month vs ~£5,713 in England/Wales/NI — roughly £3,300+/year difference. Switch Region in the calculator to compare.
Levers that help
- Pension contributions (can reduce adjusted income and ease taper pressure)
- Salary sacrifice simulations in Advanced Features
- Bonus modelling so a one-off doesn’t surprise you
How we estimated this
Standard allowance scenario, employee PAYE, no student loan/pension/bonus. Estimates only — tax codes and benefits can change your payslip. Consult HMRC for official figures.