Deferring your State Pension: the 1% every 9 weeks rule explained

If you do not claim your State Pension when you reach State Pension age, it can be paid later with an increase. This guide explains how the extra is worked out, how it is taxed and when it does not build up.

What deferring means and how it works

Deferring simply means not claiming your State Pension when you reach State Pension age. For most people it happens automatically: the Pension Service does not pay a State Pension that has not been claimed, so nothing needs to be done to start deferring. Some people do it on purpose, for example because they are still working and do not need the income yet. Others defer by accident because they never claimed. When you do claim, GOV.UK says the pension you left unclaimed can usually be taken as extra weekly pension for life, as a one-off arrears payment (a lump sum covering past weeks), or as both. The rules below are for people who reach State Pension age on or after 6 April 2016, which GOV.UK describes as men born on or after 6 April 1951 and women born on or after 6 April 1953.

The key figures and limits

To get increased weekly payments you must defer for at least 9 weeks. After that, GOV.UK says your regular weekly pension rises by 1% for every 9 weeks you defer, and the increase is paid for life. That works out at just under 5.8% for every 52 weeks. The percentage is applied to your own weekly amount, so someone on a lower State Pension gets a smaller cash increase than someone on the full rate. GOV.UK says the extra amount usually goes up each year in line with the Consumer Price Index (CPI), the official measure of inflation, although it does not rise for some people who live abroad.

The alternative is a one-off arrears payment. GOV.UK says you can claim this for up to 52 weeks (12 months) of deferral, and no interest is added. If you defer for longer than 52 weeks, the weeks beyond that are paid as extra weekly pension instead. You can also combine the two. GOV.UK gives the example of a person on the full new State Pension who defers for 78 weeks: they can backdate 12 months and receive a lump sum of £12,547.60, and the additional 26 weeks add £6.97 a week (2.89% of £241.30). The full new State Pension is £241.30 a week in 2026/27.

A worked example

These figures are illustrative and use the full new State Pension of £241.30 a week. Suppose someone defers for 18 weeks. That is two lots of 9 weeks, so the increase is 2%. Two per cent of £241.30 is £4.826, or about £4.83 a week, which is roughly £251 over 52 weeks. For a longer deferral, GOV.UK's own examples show that 52 weeks adds £13.99 a week and 104 weeks adds £27.99 a week. Taking 52 weeks of pension as extra weekly money means giving up 52 x £241.30 = £12,547.60 now in return for £13.99 x 52 = £727.48 a year later. GOV.UK says it takes over 15 years to get back 52 weeks of deferred pension, and about a year longer for each further 52 weeks deferred. Simple division of the two figures above gives about 17 years before any annual increases are counted, which is consistent with that statement.

Tax matters too. The extra pension counts as taxable income. GOV.UK says the Personal Allowance, the amount you can earn before paying Income Tax, is £12,570 in 2026/27 for England, Wales and Northern Ireland, and that the State Pension counts towards it. The full new State Pension over a year is 52 x £241.30 = £12,547.60, which is only £22.40 below that allowance. In this illustration, with no other income, an extra £727.48 a year would leave about £705.08 above the allowance. At the 20% basic rate in England, Wales and Northern Ireland that is about £141.02 of tax, leaving roughly £586.46 of the extra. Income Tax bands are different in Scotland, so the result there can differ. GOV.UK says extra payments from deferring could be taxed and does not set out separate rules for a lump sum, so it can be worth checking how an arrears payment is treated.

Who this applies to, and who it does not

The 1% per 9 weeks rule applies to people who reach State Pension age on or after 6 April 2016. If you reached State Pension age before that date, different rules apply: GOV.UK says you must choose between increased payments and a lump sum (with an exception for some people who deferred before 2005), increased payments are 1% for every 5 weeks, and a lump sum needs at least 12 months of deferral and includes interest. People in that group can also sometimes inherit a partner's deferred pension, which is not available to the newer group. Deferral also does not build up in some situations. GOV.UK lists several benefits that stop you building up extra State Pension, including Pension Credit, Universal Credit, income-related Employment and Support Allowance and Carer's Allowance. It also says this applies if your partner receives Pension Credit, Universal Credit or income-related Employment and Support Allowance, and that you cannot build up deferred pension for time spent in prison. Time on those benefits does not count towards the 9-week minimum.

Things to think about and where to get free help

Deferring is a trade-off rather than a free gain. A higher weekly amount is paid for life, but over a shorter period if the person lives for fewer years, and the money not claimed in the meantime is given up unless it is taken as arrears. MoneyHelper, the free government-backed guidance service, makes the same point about life expectancy. Many people find it useful to look at their State Pension forecast on GOV.UK, think about other income and tax, and compare the claimed and deferred routes before deciding. The Pension Service can answer questions about a specific claim, and people in Northern Ireland claim through nidirect rather than GOV.UK. Free, impartial guidance on retirement choices is available from MoneyHelper and from Pension Wise for defined contribution pensions. None of this is advice, and your own circumstances may change the picture.

• Deferral is automatic if you do not claim, and you can claim at any time later.
• You need at least 9 weeks of deferral for extra weekly pension.
• Up to 52 weeks can be taken as a one-off arrears payment with no interest.
• The extra counts as taxable income and usually rises with CPI each year.

Check before you act

Rates, rules and tax bands change, so confirm every figure on the official pages linked below before making a decision, and contact the Pension Service or MoneyHelper if anything is unclear. This guide was checked on 19 October 2026.

Sources

• GOV.UK: Defer (delay) your State Pension, new State Pension rules
• GOV.UK: Deferring your State Pension, full guide including older rules and benefits
• GOV.UK: The new State Pension, what you will get
• GOV.UK: Income Tax rates and Personal Allowances
• GOV.UK: Tax on pension
• MoneyHelper: Increase your State Pension by deferring your claim