In this article
01How early retirement works in the UK
Retiring early in the UK usually happens in three stages, and each one needs its own money:
The bridge years
From the day you stop work until you can take your pension. You live on savings, ISAs and any other money you can reach. This is often where an early retirement plan comes under the most pressure.
Pension years
For most people, from age 57 once the minimum pension age rises on 6th April 2028, you can take money from defined contribution pensions. Usually up to 25% is tax‑free, within your lump sum allowance, and the rest is taxed as income.
State Pension years
From State Pension age, your State Pension covers part of your spending, so you need to draw less. State Pension age is rising from 66 to 67 between 2026 and 2028, and under current law to 68 between 2044 and 2046.
The calculator runs through those stages year by year and finds the earliest age at which, on your figures and our assumptions, your money would last to the age you choose.
02Your savings rate makes a big difference
A simple way to think about early retirement is your savings rate: the share of your take‑home pay that you save. The more you save, the less you spend, so you need a smaller pot and you could get there sooner. Starting from nothing, this is roughly how long it takes:
Years to early retirement by savings rate
| You save | You spend | Years until you could retire |
|---|---|---|
| 10% of take‑home pay | 90% | 59 |
| 20% of take‑home pay | 80% | 42 |
| 30% of take‑home pay | 70% | 31 |
| 40% of take‑home pay | 60% | 24 |
| 50% of take‑home pay | 50% | 18 |
| 60% of take‑home pay | 40% | 14 |
| 70% of take‑home pay | 30% | 10 |
| 80% of take‑home pay | 20% | 6 |
An illustration only. It uses the well‑known 4% rule (you can stop once your savings are 25 times your yearly spending) because it makes it easy to see the effect of saving more. It assumes about 4% a year growth after inflation, starts from £0 and ignores tax, the State Pension and the pension access age. Our calculator above doesn’t use the 4% rule: it works through your plan year by year instead.
03How much do I need to retire early?
A common starting point is the 4% rule: you’d need about 25 times your yearly spending. It comes from US research on 30-year retirements. Retire early and your money may need to last 40 years or more, and UK markets have behaved differently from the US, so many planners use a lower starting rate for long retirements. No withdrawal rate is guaranteed to be safe.
Your State Pension changes the picture a lot. The full new State Pension is £12,548 a year in 2026/27, so once it starts you need less from your own savings.
Rough pot size needed, in today’s money
| Yearly spending | 4% rule (25 times) | 3.5% withdrawal | 4% rule, with full State Pension |
|---|---|---|---|
| £20,000 a year | £500,000 | £571,429 | £186,300 |
| £30,000 a year | £750,000 | £857,143 | £436,300 |
| £40,000 a year | £1,000,000 | £1,142,857 | £686,300 |
| £50,000 a year | £1,250,000 | £1,428,571 | £936,300 |
Rough guide only, in today’s money. The last column assumes the full new State Pension and is the pot needed once it’s being paid. You’d need more to cover the years before it starts.
04Pensions, ISAs and the bridge to 57
Pensions can be very tax-efficient, thanks to tax relief on what you pay in and, often, contributions from your employer. But for most people, from 6th April 2028, they can’t be touched until 57, and the right balance between pensions and ISAs depends on your tax position, your employer’s contributions, when you need the money and how it will be taxed when you take it out.
ISAs can help with the bridge years. You can pay in up to £20,000 a year, and you can take money out tax‑free at any age. The planned cut to the cash ISA limit was scrapped at the October 2026 Budget, so all £20,000 can still go into a cash ISA if you prefer.
If the calculator shows your savings running out before you can take your pension, you’ll see it in the result. Saving more outside your pension, or retiring later, are two of the levers you can test.
05How we calculate your result
This calculator uses a simplified year‑by-year projection based on the figures you enter. Here’s exactly what it does, and what it leaves out.
The projection
- Everything is projected in future pounds, then shown in today’s money by taking off inflation. Your spending, your monthly saving, your State Pension and any defined benefit pension all rise with inflation.
- Growth is applied once a year at the rates you choose: by default 7% on pensions and investments and 2% on cash, before inflation and after charges.
- Your money “lasts” if, in every year up to the age you choose, there’s enough to pay your spending, and your savings never fall below any safety reserve you set. With no reserve, a plan can count as lasting even if very little is left.
- The earliest age is the first age, from now up to 80, at which the plan lasts.
Order of withdrawals
- Cash savings first, then defined contribution pensions (once you can take them), then general investment accounts, then stocks and shares ISAs.
- This keeps things simple, but it isn’t always the most tax-efficient order. For example, taking some pension income each year to use your personal allowance can reduce the tax you pay overall.
Tax
- Income tax uses 2026/27 rates and bands for England, Wales and Northern Ireland, on your State Pension, any defined benefit pension and pension withdrawals. Thresholds are frozen until April 2031, so we reduce them in real terms until then, and assume they rise with inflation afterwards. Scottish income tax rates are different and aren’t modelled.
- Pension withdrawals assume one particular way of taking money: 25% of each withdrawal is tax‑free and 75% is taxed as income, until the tax‑free amount reaches the £268,275 lump sum allowance. Your own allowance may be lower if you’ve already taken tax‑free cash, or different if you have a protection. Not every pension lets you take money this way, and tax on pensions depends on your circumstances.
- General investment accounts when you sell, we work out the gain and apply capital gains tax at 18% or 24% after the £3,000 annual exempt amount. We don’t model tax on dividends or interest, so results may slightly overstate what’s available.
- ISAs are tax‑free. We don’t model tax on interest from cash savings outside ISAs.
Pension and State Pension ages
- State Pension age is set from your date of birth using the current timetable, rounded up to a whole year. If your State Pension age includes extra months, the calculator starts it from the next birthday. Check your exact date on GOV.UK.
- Pension access age is 57 for most people from 6th April 2028, or 55 if you were born before 6th April 1971 or have a protected pension age. Your scheme may set a later age, and the minimum pension age doesn’t mean every scheme must let you take money then.
What’s not included
- The annual allowance and money purchase annual allowance, other than a warning if your pension saving looks high.
- Defined benefit pension rules beyond the income and start age you enter.
- Inheritance tax: from 6th April 2027, most unused pension funds will usually count towards your estate.
- Couples: the calculator works for one person at a time.
- Future changes to tax, pensions or the State Pension.
Methodology last reviewed: 27th October 2026.
06Frequently asked questions
Can I retire at 55?
From 6th April 2028 the earliest age most people can take a private pension rises from 55 to 57, unless they have a protected pension age. So to stop work at 55 after that, you’d need ISAs or other savings to live on for at least two years. Use the calculator to check whether yours would last.
How much do I need to retire early in the UK?
A common rule of thumb is 25 times your yearly spending, based on the 4% rule. For £30,000 a year that’s £750,000. A longer retirement, like an early one, may need a lower withdrawal rate, which would mean a bigger pot. Your State Pension reduces how much you need once it starts, and you’ll need enough outside pensions to bridge the years before 57.
What is the ISA bridge?
It’s the money you live on between stopping work and being able to take your pension, usually from ISAs because you can take money out tax‑free at any age. If you want to retire at 50, your ISAs and savings need to cover at least seven years of spending before you can take your pension at 57.
Is the 4% rule safe in the UK?
It’s a useful starting point, but it comes from US market history and a 30-year retirement. Retire early and your money may need to last 40 years or more, and UK returns and costs differ, so a lower starting rate may be more prudent. Flexible spending and your State Pension both help. That’s why the calculator models your own plan year by year rather than relying on a fixed rule.
What is FIRE?
FIRE stands for Financial Independence, Retire Early. It’s about saving a high share of your income, often 50% or more, so that your investments can cover your living costs years before normal retirement age.
When will I get my State Pension?
State Pension age is rising from 66 to 67 between 2026 and 2028. Under current law it then rises from 67 to 68 between 2044 and 2046, for people born on or after 6th April 1977, reaching 68 for anyone born on or after 6th April 1978. A future review could change this. The full new State Pension is £12,548 a year in 2026/27, but you need 35 qualifying years of National Insurance to get it all. You can check your State Pension age and forecast on GOV.UK.
Should I save into a pension or an ISA for early retirement?
Usually both. Pensions give tax relief and often employer contributions, so they’re hard to beat for money you’ll use from 57. ISAs are better for the bridge years, as you can reach them at any age. The right split depends on when you want to stop work.
Does the calculator include tax?
Yes, for pension withdrawals. It assumes 25% of each withdrawal is tax‑free, up to the £268,275 lump sum allowance, and the rest is taxed at 2026/27 rates for England, Wales and Northern Ireland, alongside your State Pension. It allows for income tax thresholds being frozen until April 2031. Final salary pension income and your State Pension are taxed alongside it. For general investment accounts it estimates capital gains tax on the gain part of each withdrawal, using the £3,000 annual exempt amount, but it doesn’t model dividend or interest tax on those accounts. ISA withdrawals are tax‑free. It doesn’t include Scottish rates or future tax changes.
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Plain‑English guides to pensions, tax and the State Pension.
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Jamie Kyte APFS
Jamie Kyte APFS is a Chartered Financial Planner and Independent Financial Adviser with over a decade of experience helping people plan for retirement. He specialises in retirement income planning, pension drawdown and helping clients make confident decisions about when they can afford to stop working.
Jamie holds the Chartered Financial Planner title awarded by the Chartered Insurance Institute, alongside the Advanced Diploma in Financial Planning (Level 6) and the Diploma in Financial Planning (Level 4). He is the founder of When Can I Retire? and Kyte Financial Planning.
Kyte Financial Planning is an Appointed Representative of ValidPath Limited, which is authorised and regulated by the Financial Conduct Authority. You can verify Jamie’s regulatory status on the FCA Register and connect with him on LinkedIn.
More from JamieThis calculator is for information and education only and is not financial advice. It uses simplified assumptions about growth, tax and spending, and real life will be different. Investment values can fall as well as rise, and you may get back less than you put in. Tax rules can change. If you’re thinking about retiring early, it could make sense to speak to a regulated financial adviser.