What is the State Pension Deferral Calculator?
The State Pension Deferral Calculator helps you explore what happens if you delay claiming your State Pension.
Instead of taking the pension as soon as you reach State Pension age, you can leave it unclaimed for a period. Depending on the rules that apply to you, this can mean a higher weekly State Pension later or allow you to claim some deferred payments as arrears.
The calculator compares what you give up while waiting with what you could receive later, so you can see the trade-off rather than looking at the higher pension figure on its own.
Before you start
Use the weekly State Pension amount from your personal GOV.UK forecast if you have it.
Do not automatically use the full State Pension. Your own amount can be lower or, in some circumstances, higher because of your National Insurance history and the transitional rules.
How the Calculator Works?
The calculator starts with the State Pension you could claim at State Pension age.
It then calculates how much pension you would not receive while you defer and applies the current deferral increase to the period you delay.
The results compare the pension forgone with the higher regular payment available later and estimate how long it takes the additional payments to catch up.
Where relevant, it also shows the current option to claim up to 52 weeks of deferred new State Pension as arrears.
It uses 2026/27 rates and shows figures before tax unless you turn on the tax comparison. It does not model benefits, what a partner might inherit or the lump sum available under the old rules.
Step One: Add your State Pension
Use your personal State Pension forecast rather than automatically assuming you receive the full rate.
Step Two: Choose how long you might defer
Try six months, one year, two years or another period.
Step Three: Compare what you give up with what you get later
See the missed payments, higher weekly pension and simple break-even point.
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Understanding Your Results
Pension forgone
This is the State Pension you could have received during the period you chose to defer.
It is a real cost of the decision, even if you did not need the money for day-to-day spending.
Higher weekly State Pension
This shows the additional regular State Pension generated under the current deferral rules.
Simple break-even
This estimates when the extra pension received later catches up with the payments not taken earlier.
It is not a prediction of whether deferral will turn out to have been a good decision.
Arrears
Under current new State Pension rules, you may be able to claim up to 52 weeks of deferred pension as an arrears payment instead of using all of the period to build additional regular pension.
The wider plan
Consider what funds your spending while the State Pension is deferred. If the answer is extra pension withdrawals or ISA spending, include that in your thinking.
What else should I think about?
Benefits
Receiving benefits? Stop before relying on this calculation. Certain benefits, including some paid to your partner, can prevent you building extra State Pension while you defer, and a higher State Pension later can affect means-tested benefits. Check the current GOV.UK rules for your circumstances.
Higher guaranteed income later
There is another way to look at this. Deferring can exchange income you could take now for a larger regular government pension later in life. Some people may value that higher guaranteed income in their 70s, 80s and beyond, even if the simple break-even calculation takes many years.
Others may prefer to receive the money earlier while they are younger or avoid drawing down other savings unnecessarily. The calculator is there to show that trade-off, not decide it for you.
Three people deciding when to claim
The same rules can point different ways depending on what pays for the wait, tax and how much someone values income later. These examples show three people running their own numbers.
David is still working
£241.30 a week • Working one more year • 20% tax on his State Pension now and later • Plans to 87
David reaches State Pension age but plans to work for another year. His salary already uses his Personal Allowance and some of his basic-rate band. He tests whether delaying his £241.30 weekly pension for a year could give him more regular State Pension once he stops working.
- With the tax comparison on, waiting a year means giving up about £10,038 after tax
- His State Pension rises by £13.94 a week, and the extra is taxed at 20% too
- Break-even stays at about 85, and he is £1,089 ahead by 87
- If his pay meant 40% tax this year, break-even would move to about 81
What he’s really exploring
Timing taxable income rather than simply chasing the uplift. The Marginal Tax Rate Calculator shows which band his State Pension would fall in.
Helen has already retired
£241.30 a week • Stopped working • Would spend about £12,500 from her ISA • Plans to 90
Helen has stopped working and could use her State Pension immediately. To defer for a year she would need to draw roughly another £12,500 from her ISA. The higher pension looks attractive, but she now compares that against spending more of her accessible savings today.
- Before tax, waiting a year catches up at about 85 and is £3,557 ahead by 90
- If her ISA would have grown 2% a year above inflation, break-even allowing for the assumed return on money received earlier moves to about 89
- By 90, the difference after allowing for the assumed savings return is £375
What she’s really exploring
Whether swapping ISA capital for additional guaranteed income later suits her plan.
Martin wants more guaranteed income later
£241.30 a week • Defined benefit pension covers his spending • Waits 2 years • Plans to 90
Martin has a defined benefit pension that comfortably covers much of his spending in his late 60s. He is less concerned about income now and likes the idea of increasing the amount of State Pension he receives for the remainder of retirement. He compares the break-even age with his wider retirement income rather than looking at the uplift percentage alone.
- Waiting 2 years means not taking about £25,095
- His State Pension rises to £269.18 a week, about £1,450 a year more
- Simple break-even at about 86. He is £5,828 ahead by 90 but £8,955 behind at 80
- Taking the last 12 months as arrears instead gives him £12,548 at 69 plus £13.94 a week more, and £2,670 ahead by 90
What he’s really exploring
The balance between money now and guaranteed income later. The Retirement Income Calculator puts the bigger State Pension alongside his other income.
Frequently Asked Questions
What does deferring my State Pension mean?
It means not claiming your State Pension when you reach State Pension age. You do not have to do anything to defer: if you do not claim, it is deferred until you do. When you claim later, you can get a higher weekly State Pension, a one-off payment of missed weeks, or both, depending on the rules that apply to you.
How much extra State Pension do I get if I defer?
If you reached State Pension age on or after 6 April 2016, your State Pension goes up by 1% for every 9 weeks you defer. That is just under 5.8% for a full year, or about £14 a week on the full new State Pension of £241.30. GOV.UK rounds this to 5.8% (£13.99). The exact rule gives £13.94, which is what the calculator uses.
Can I take deferred State Pension as a lump sum or arrears?
Under the new State Pension rules you can usually claim up to 52 weeks of missed payments as a one-off arrears payment. No interest is added, and those weeks do not count towards the increase. If you defer for longer than 52 weeks, you can take the last 12 months as arrears and get the increase on the rest. People on the old rules have a different lump-sum option, covered below.
How long do I need to defer?
At least 9 weeks for any increase under the new rules, or 5 weeks under the old rules. There is no upper limit. Each further 9 weeks adds another 1%.
Do I have to defer if I continue working?
No. You can claim your State Pension and keep working. Working and claiming are separate decisions, so it is worth testing both.
Is deferred State Pension taxable?
Yes. The State Pension, the extra from deferring and any arrears are all taxable income. Turn on the tax comparison under Add more detail to test a different rate while you work and after you stop. The Marginal Tax Rate Calculator shows which band your next pound falls in. If you would draw more from a pension pot while you wait, the Pension Drawdown Tax Calculator shows the tax on that.
How is the break-even age calculated?
The simple break-even divides the pension you do not take by the extra you get each year. For a one-year wait on the full State Pension, that is £12,548 ÷ £725, or about 17 years after you claim. The chart adds up both options year by year in today’s money, with the main State Pension rising with the triple lock and the extra rising with prices. If you add a growth rate for savings, the chart shows the present value of payments instead, so the break-even allows for the assumed return on money received earlier.
What happens if I receive Pension Credit or other benefits?
You cannot build up extra State Pension while you, or for some benefits your partner, get certain benefits. These include Pension Credit, Universal Credit, Carer’s Allowance and income-related Employment and Support Allowance. A higher State Pension later can also reduce means-tested help such as Pension Credit, Housing Benefit and Council Tax Reduction. Check GOV.UK before deferring.
Does deferred State Pension increase every year?
Yes, but only with prices (the Consumer Prices Index). The main State Pension rises with the triple lock. If you live abroad, the extra may not rise at all in some countries.
Do the same rules apply to the old basic State Pension?
No. If you reached State Pension age before 6 April 2016, you get 1% for every 5 weeks you defer, just under 10.4% a year. If you defer for at least 12 months, you can choose a lump sum with interest at 2% above the Bank of England base rate instead. The calculator can switch to the old rate under Add more detail, but it does not model the lump sum.
Can I change my mind after deferring?
Yes. You can claim at any time, and the deferral stops when you do. Under the new rules you can usually backdate your claim by up to 12 months and take those weeks as arrears instead of the increase. If you have already started getting your State Pension, you can usually stop it once to defer.
Should I use the full State Pension or my own forecast?
Your own forecast. Your amount can be lower or, in some cases, higher than the full rate because of your National Insurance record and the transitional rules. Check it on GOV.UK, or estimate it with the State Pension Forecast Calculator. If your record has gaps, the State Pension Gap Calculator and State Pension NI Top-Up Breakeven Calculator show what filling them could add.
Trust and education
Certified Money First Aider®
These calculators are built by a Certified Money First Aider to help you think more clearly about money and time. Money First Aid® is about practical, non-judgemental support for financial wellbeing. The calculators can certainly help you make informed decisions, but they are not regulated financial advice.
Behind Retirement Calculators
Built from the questions I was asking myself
I'm Ryan, the person behind Retirement Calculators. I started the site after selling an online business and trying to understand what our pensions, ISAs, investments and property actually meant for the way we wanted to live.
The calculators are built around those real decisions: whether you could work less, retire earlier, spend more now or use your money differently. They will not give you a perfect answer, but they can make the trade-offs much easier to see.
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