How much do I need to retire in the UK?
The honest answer — and why the number is different for everyone.
Everyone wants a number.
Financial advisers give you rules of thumb. Pension providers give you calculators. The internet gives you everything from £250,000 to £1.5 million, depending on which article you land on.
None of them know your actual life.
The standard answers — and why they're not enough
The most common rule of thumb is that you need 25 times your annual spending in retirement. Spend £30,000 a year, you need £750,000. Spend £50,000, you need £1.25 million.
That figure comes from the "4% rule" — an American study suggesting you can withdraw 4% of your portfolio annually without running out of money over 30 years. It's a reasonable starting point. It's not your answer.
Here's why.
The 4% rule doesn't account for your State Pension — which for most UK workers will cover a meaningful chunk of basic living costs from age 66 or 67 onwards. It doesn't account for defined benefit pension income if you have it. It doesn't account for whether you own your home outright, which transforms the maths entirely. It doesn't account for your actual spending — not an average, but your specific mortgage (or lack of one), your lifestyle, your family situation.
And it certainly doesn't account for what happens to UK tax rates, inflation and investment returns over the next 30 years.
The real question
The question isn't "how much do I need?" in the abstract.
It's: at what point does the income I can generate from everything I have — pensions, investments, savings, State Pension, any other income — cover what I actually spend?
That question has a real answer. It's specific to you. And it changes every time your circumstances change.
What the numbers actually look like
For a single person in the UK who owns their home, has no mortgage, and wants to spend around £25,000 a year in retirement:
The full new State Pension is currently around £11,500 a year, starting at 66 or 67.
That leaves about £13,500 a year to fund from savings and pensions.
To fund £13,500 a year from a SIPP or investment portfolio at a 4% withdrawal rate, you need roughly £337,500.
So the headline "you need £1 million to retire" — which you'll see constantly — applies to someone spending significantly more, without full State Pension, potentially still with housing costs. For many people, the real number is quite different.
For a couple, the picture changes again. Two State Pensions together come to around £23,000. For a couple spending £40,000 a year, the gap to fund is only £17,000 — requiring perhaps £425,000 in combined savings and pensions.
These are illustrations. They're not your numbers. But they show how differently the maths can work out depending on your actual situation.
Why you need to model it properly
The reason the standard answers are so wide-ranging — "you need between £250k and £1.5m" — is that the range covers everyone. Which is to say, it covers no one specifically.
Your number depends on:
When you plan to retire
What you'll spend — and how that changes over time
Your State Pension entitlement and when it starts
What's in your pensions, ISAs, savings and investments right now
Whether you have a mortgage still running
Whether you're planning for one person or two
What you want to leave behind
None of that is in a calculator that asks for your age and income and spits out a single figure.
How giltedge approaches it
giltedge builds a 50-year projection from your actual numbers — your pension pots, your savings, your income streams, your expenses, your mortgage if you have one.
It runs UK tax through the projection, so pension drawdown is taxed correctly. The State Pension appears when it actually starts, at the right amount. The model shows you, year by year, whether your money holds up — and if it doesn't, exactly when and why.
The "When Can I?" card finds your retirement date: tell it what monthly income you need, and it finds the earliest month your assets can support it.
That's not a rule of thumb. That's your number.
