Enter your UK income, what you actually save each month into your ISA, SIPP, or other investments, and your expenses. See your savings rate, years to FI, and how the UK tax wedge affects what you can realistically save.
Based on starting from zero net worth, 7% annual return, 4% safe withdrawal rate. Your nearest rate row is highlighted.
A £60,000 gross salary in the UK yields roughly £44,000 take-home after income tax and NI (2026/27). Saving £1,833/month (£22,000/year, just under the ISA limit) with £1,833/month expenses gives a 50% savings rate. At 7% return inside a Stocks & Shares ISA, this reaches FI in roughly 17 years — all growth entirely tax-free.
Your savings rate is the single most powerful lever on your path to financial independence. In the UK, the income tax and National Insurance wedge typically takes 28–42% of gross pay, which limits the maximum achievable savings rate from a given gross salary more than in lower-tax countries like Singapore.
UK wrapper advantage: Inside a Stocks & Shares ISA (up to £20,000/year) or LISA (up to £4,000/year with a 25% government bonus), all growth and income are tax-free. This means the nominal return this calculator shows is also your real take-home return — unlike a General Investment Account where capital gains tax (10–20%) and dividend tax apply.
Salary sacrifice into a SIPP reduces both income tax and employer/employee NI, effectively giving you more money to save. Many UK FIRE practitioners combine a SIPP (for pension-age wealth) with an ISA (for early-retirement bridge) to optimise both tax relief and access.
Important: figures are nominal (pre-inflation). To see real after-inflation growth, subtract roughly 2–3% (UK CPI) from your return assumption.
Savings rate is the percentage of your take-home (post-tax, post-NI) income that you save or invest each month — including ISA, SIPP, and any other investments.
A higher income without a higher savings rate just inflates your FI target. In the UK, where a £60k gross salary yields only ~£44k take-home, focusing on savings rate from take-home pay keeps the maths simple and honest.
At 50% of take-home you can reach FI in roughly 17 years from zero. The £20,000 ISA annual allowance means a 50% savings rate on a £40,000 take-home is fully sheltered from capital gains and dividend tax.
Your savings rate determines both your annual investment and your spending level (FI target = 25× annual expenses at 4% SWR). The higher the rate, the faster the portfolio grows and the lower the target — years to FI fall sharply as savings rate rises.
Income tax and National Insurance reduce take-home significantly. Pension contributions via salary sacrifice reduce your NI and income tax, improving the effective rate. Inside an ISA or LISA, growth is entirely tax-free. Outside any wrapper, capital gains tax (10–20%) and dividend tax apply — model with a return rate ~1–2% lower.
ProFinanceCast tracks your savings rate, ISA allowance usage, and pension contributions over time — and shows which change moves the FI date most. Free forever for the core forecast.