What a lump sum actually means in the AFPS
In Armed Forces Pension Scheme terms, a lump sum is a one-off, tax-free cash payment that lands in your bank account at the point your pension benefits come into payment. It sits alongside your regular pension income, not instead of it. Think of it as two streams from the same source: a monthly or annual income for the rest of your life, plus a single capital sum paid up front. The two are linked, because in most cases the size of the lump sum is worked out directly from the size of your annual pension.
The phrase trips people up because it means slightly different things depending on which scheme you are in. Under the older final-salary schemes, AFPS 75 and AFPS 05, the lump sum is automatic and you do not have to do anything to get it. Under the newer career average scheme, AFPS 15, there is no automatic lump sum at all, so if you want cash up front you have to create it yourself by giving up some annual pension. That single difference catches out a lot of people who served across the schemes.
It is worth being clear about what a lump sum is not. It is not a separate pot of money you have paid in, like a private savings account, and it is not a bonus added on top of a full pension. It is part of the overall value of your scheme benefits, paid in a different shape. Understanding that shape, automatic cash on the legacy schemes versus self-created cash on AFPS 15, is the key to reading your own forecast properly.
How the lump sum works on AFPS 75
AFPS 75 is a final-salary scheme, and it pays an automatic tax-free lump sum equal to three times your annual pension. You do not opt in and you cannot opt out of it; it is built into the design. So if your annual pension works out at a given figure, your lump sum is simply that figure multiplied by three. There is no form to fill in and no trade-off to weigh up, because the cash is not being taken from your pension income. It is an addition that comes as standard.
The pension itself on AFPS 75 is based on the representative pay for your final rank and your length of reckonable service, building up to a maximum of 48.5% of that representative pay over a full career. A full career here means 34 years for officers and 37 years for other ranks, ratings and marines. The lump sum is calculated from whatever annual pension that produces, so a longer career and a higher final rank lift both the pension and the three-times lump sum together.
Because the lump sum is fixed at three times pension, there is no commutation decision to make on the basic AFPS 75 benefit in the way there is on AFPS 15. AFPS 75 does have separate, age-based resettlement commutation options that use Government Actuary's Department factor tables, but those are a specialist topic and our calculator does not model them. For the standard benefit, the rule you need to remember is simple: lump sum equals three times the annual pension, paid tax free.
How the lump sum works on AFPS 05
AFPS 05 is also a final-salary scheme and, like AFPS 75, it pays an automatic tax-free lump sum of three times your annual pension. The mechanics of the lump sum are the same, but the pension it is built on is calculated differently. AFPS 05 builds 1/70th of your final pensionable pay for each year of reckonable service, up to a maximum of around 57% of final pay. Multiply that annual pension by three and you have your automatic lump sum.
The normal pension age on AFPS 05 is 65, which is later than the age 60 used on AFPS 75. That difference matters for timing rather than for the lump sum formula itself, because the three-times multiple is identical on both legacy schemes. What changes between them is the underlying pension that drives the cash figure, so two people with similar service can end up with quite different lump sums depending on which scheme their service fell under.
AFPS 05 also offers an Early Departure Payment, or EDP, for those who leave before pension age with enough qualifying service, broadly 18 years' service and age 40. The EDP comes with its own tax-free lump sum, separate from the lump sum paid when the full pension starts. It is easy to confuse the two, so when you read a forecast, check whether a lump sum figure relates to the EDP at the point you leave or to the main pension that begins at age 65.
Why AFPS 15 has no automatic lump sum
AFPS 15 is a career average revalued earnings scheme, and it was designed without an automatic lump sum. Each year you bank 1/47th of that year's pensionable pay as pension, and every banked slice is revalued for inflation so it keeps its value over time. Add the revalued slices together at retirement and you have your annual pension. Nothing in that process produces cash up front, which is the single biggest change people notice when comparing AFPS 15 with the legacy schemes.
If you want a tax-free lump sum on AFPS 15, you create one by commuting part of your pension. Commutation means giving up some of your annual income permanently in exchange for cash now. The exchange rate is fixed and scheme-wide at roughly 12 to 1, so every pound of annual pension you surrender buys about 12 pounds of tax-free lump sum. HMRC rules cap how much you can commute, and on AFPS 15 the practical limit is up to 25% of your pension.
This is a genuine decision, not an automatic benefit, and it has a permanent effect. The pension you give up is gone for good, and the reduced pension is what then rises with the cost of living each year for the rest of your life. Some people value the cash now to clear a mortgage or fund resettlement; others would rather keep the larger guaranteed income. There is no single right answer, but it is the one area of lump sum planning where the choice genuinely sits with you.
A worked example to show the shape of it
Here is an illustrative example using only round numbers, to show how the lump sum follows from the pension. It is not a quote or a forecast for any individual. Suppose a legacy-scheme pension comes out at 10,000 pounds a year. On AFPS 75 or AFPS 05 the automatic tax-free lump sum is three times that figure, so 30,000 pounds, paid as a single tax-free sum when the pension starts. The annual pension of 10,000 pounds is unchanged by the lump sum, because the cash is an addition, not a deduction.
Now take the same 10,000 pound figure as a deferred pension under AFPS 15, where there is no automatic lump sum. To create cash, you commute part of it at the fixed 12 to 1 rate. If you commute the maximum 25%, you surrender 2,500 pounds of annual pension. That surrendered pension buys a tax-free lump sum of 2,500 multiplied by 12, which is 30,000 pounds. Your pension then drops permanently to 7,500 pounds a year, and it is that lower figure that rises with inflation from then on.
Notice the trade-off in the AFPS 15 case: the same 30,000 pound lump sum costs you 2,500 pounds of income every year for life. On the legacy schemes you would have received both the full 10,000 pound pension and the 30,000 pound lump sum, because there the cash is automatic and free-standing. That is the whole point of the comparison, and it is why understanding which scheme your service falls under is the first thing to get straight before you read any lump sum figure.
Tax treatment and why it matters
The headline point on tax is a welcome one: the AFPS pension lump sum is paid tax free. That applies to the automatic three-times lump sum on AFPS 75 and AFPS 05, and to the lump sum you create by commuting pension on AFPS 15. The regular pension income that follows is taxable in the normal way as it is paid, but the capital sum itself comes to you without income tax taken off, which is a meaningful advantage when you are planning a large purchase or paying down debt.
This tax treatment is exactly why commutation can look attractive on AFPS 15. You are swapping taxable future income for tax-free cash now, at a fixed 12 to 1 rate. Whether that is a good deal depends on your circumstances, your other income, your health and how long you expect to draw the pension, and it is a personal financial decision rather than something we can decide for you. What we can say plainly is that the cash arrives tax free and the income you give up would have been taxable.
Because the tax position is favourable, do not assume a lump sum is too good to be true or that there is a hidden charge waiting. There is not, for the standard scheme lump sums described here. The cost on AFPS 15 is the income you surrender, not a tax bill. If your wider affairs are complex, for example if you have other large pensions, it is sensible to take regulated advice, because lifetime allowances and other limits sit outside what an estimate tool can capture.
How to check your own lump sum position
Start by working out which scheme rules apply to you, because that decides whether your lump sum is automatic or something you have to create. Anyone serving from 1 April 2022 onwards is building AFPS 15, which has no automatic lump sum. If you were serving during the McCloud remedy period, 1 April 2015 to 31 March 2022, you may get a choice between legacy and AFPS 15 benefits for those years, and that choice can change both your pension and your lump sum. Your Remediable Service Statement is the document that sets out the comparison.
Next, look at how any lump sum figure is described. A legacy lump sum of three times pension behaves very differently from an AFPS 15 commutation lump sum that reduces your income. On an EDP, the lump sum is different again: an AFPS 15 EDP lump sum, for instance, is 2.25 times the preserved pension and is paid when you leave, not when your main pension starts. Reading the label carefully stops you double counting cash or comparing figures that are not like for like.
Our calculator is built to make this clearer. It models the automatic three-times lump sum on AFPS 75 and AFPS 05, and it models AFPS 15 commutation precisely using the fixed 12 to 1 factor and the 25% cap. You can move the commutation slider on AFPS 15 and watch the lump sum rise while the pension falls, which is the trade-off in action. Treat the result as a good-quality estimate to frame your thinking, not as a final figure.
Common misunderstandings about the lump sum
The most common mistake is assuming every AFPS scheme pays an automatic lump sum. The legacy schemes do, but AFPS 15 does not, and people moving from old-scheme thinking to AFPS 15 are often surprised that no cash appears unless they commute pension to create it. A related error is expecting an AFPS 15 lump sum on top of the full pension, when in reality any AFPS 15 lump sum is carved out of the pension at the 12 to 1 rate, reducing the income permanently.
Another frequent muddle is confusing the EDP lump sum with the main pension lump sum. The EDP is an early-leaver benefit paid before pension age, with its own separate tax-free lump sum, while the three-times legacy lump sum is paid when the full pension comes into payment. They are two different payments at two different times, and adding them together as though they were one figure overstates what you will actually receive. Always check which payment a given number refers to.
People also sometimes treat the lump sum as free money with no consequences on AFPS 15. On the legacy schemes that is fair, because the three-times sum is automatic and does not cut your pension. On AFPS 15 it is the opposite: the lump sum has a real, lifelong cost in the form of the income you give up. Finally, do not assume the figure on an old printout still holds; pensions in payment rise each year with the cost of living, for example by 3.8% from April 2026, so figures move over time.
How the lump sum relates to other AFPS terms
The lump sum does not stand alone; it connects to several other ideas in the scheme. It is driven by your annual pension, which in turn depends on your pensionable pay and your accrual rate, the fraction of pay you earn as pension for each year of service. On the legacy schemes the lump sum is a straight multiple of that pension, so anything that lifts the pension, such as a higher final rank or longer reckonable service, lifts the lump sum too.
On AFPS 15 the lump sum is tied to commutation and the commutation factor. The factor is the exchange rate, fixed at roughly 12 to 1, that converts surrendered pension into cash, and the Government Actuary's Department is the body that sets the actuarial factors used across the schemes. If you want to understand your AFPS 15 lump sum, you really need to understand commutation, because the two are inseparable. There is no AFPS 15 lump sum without giving up pension.
Finally, the lump sum interacts with EDP, deferred membership and remediable service. Early leavers may receive an EDP lump sum before their main pension starts; deferred members keep their benefits, including any automatic lump sum, until pension age, with the figures revalued in the meantime; and members affected by McCloud may see their lump sum change depending on whether they choose legacy or AFPS 15 benefits for the remedy years. Reading those terms together gives you the full picture of when and how much cash you will actually receive.