Defined Benefit Pension Accrual Rates Explained

A defined benefit pension promises a specified income in retirement, calculated according to a formula that typically references your service length and some measure of your pay. But the mechanics behind that formula vary significantly between schemes, and the differences can be worth tens of thousands of pounds over a retirement. Understanding accrual rates, the distinction between final salary and career average structures, how deferred benefits revalue, and how commutation factors work is essential for anyone with significant DB entitlements.

The Accrual Rate: Your Building Block

The accrual rate is the fraction of pensionable pay you earn as pension entitlement for each year of service. It is the foundational parameter of any final salary scheme.

1/80th accrual was historically common in public sector schemes. For each year of service, you earn 1/80th of your final pensionable pay as annual pension income. With 40 years of service, the total pension is 40/80ths — half your final salary. Many 1/80th schemes provided a separate automatic lump sum of three times the pension (i.e., a total lump sum of 3 × 40/80ths of salary).

1/60th accrual is more generous. Each year generates 1/60th of final salary. Over 40 years, the pension is 40/60ths — two-thirds of final salary. Most 1/60th schemes do not provide an automatic separate lump sum; members can commute pension income to create a lump sum using scheme commutation factors.

1/100th accrual (or similar fractions such as 1/98th or 1/120th) appears in some corporate schemes, particularly where the employer also provides a generous defined contribution layer or where scheme rules have been amended over time to manage cost.

Comparing accrual rates directly can be misleading if the schemes use different definitions of pensionable pay. A 1/60th scheme that uses basic salary as pensionable pay may be less valuable than a 1/80th scheme that uses total emoluments including bonuses, shift pay, and London weighting. Always read the scheme booklet's definition of pensionable earnings.

Final Salary vs Career Average Revalued Earnings (CARE)

Final salary schemes link the pension to your pay at or near retirement (or, for deferred leavers, near the date of leaving). The pension formula is: accrual rate × years of service × final pensionable pay. The key feature is that service accrued 20 years ago is effectively updated to reflect today's salary when the pension comes into payment — this provides a natural hedge against wage inflation throughout a career.

Career average revalued earnings (CARE) schemes calculate pension based on the pensionable pay in each individual year of service, revalued from that year to the date of retirement using an index (typically CPI or a fixed percentage such as 2%). The pension is the sum of each year's accrual, revalued forward.

The practical difference: For a high flier who receives substantial pay increases through their career, a final salary scheme is typically far more valuable because late-career salary pulls up the value of all earlier service. A CARE scheme captures only the contemporaneous pay level for each year. Conversely, for someone whose career earnings are relatively flat, or who expects pay to fall in the later years, CARE and final salary produce similar results.

The public sector migration from final salary to CARE (the 2015 reforms affected the NHS, teachers, civil service, and others) was specifically intended to reduce the scheme's liability by removing the "best of career" multiplication effect. For high-earning NHS consultants and senior civil servants, the switch to CARE typically reduced the long-term value of DB accrual materially.

Revaluation of Deferred Benefits

When a member leaves a DB scheme before retirement (a "deferred member"), their accrued pension must be revalued from the date of leaving to the date of retirement.

Statutory revaluation: The law requires deferred pensions to be revalued in line with CPI, capped at 5% per year for benefits accrued before April 2009 and at 2.5% per year for benefits accrued from April 2009. Many schemes provide higher revaluation — often CPI uncapped, or RPI where it remains in the scheme rules. The revaluation basis is scheme-specific and documented in the scheme's trust deed.

Implications for deferred members: In a high-inflation environment (as experienced in the UK in 2022–24), CPI-capped revaluation (at 2.5%) means that a deferred pension preserved from ten years ago may have lost significant real value. RPI revaluation, where it applies, broadly preserves purchasing power. For long-deferred members, the compound effect of the revaluation basis chosen by the scheme is material.

DB transfer value implications: Cash equivalent transfer values (CETVs) for deferred members reflect the present value of the revalued deferred pension, discounted at assumptions derived from gilt yields. When gilt yields are high, CETVs fall even if the nominal deferred pension is unchanged. Deferred members considering transfer should model the pension income alternative carefully against the transfer value on offer.

Commutation: Converting Pension to Lump Sum

Most DB schemes allow members to give up some annual pension income in exchange for a larger tax-free lump sum at retirement. This is called commutation.

The commutation factor is the key metric: it expresses how much lump sum you receive for each £1 of annual pension surrendered. A commutation factor of 20:1 means you give up £1 per year of pension income and receive £20 of lump sum. A factor of 12:1 means you receive £12 per £1 surrendered.

Is commutation good value? Whether commutation is financially advantageous depends on:

• The commutation factor offered (higher is better for the member)
• Your life expectancy (a long retirement makes keeping the income more valuable)
• Your income tax position (lump sum is tax-free; pension income is taxable)
• Alternative uses for the capital

A commutation factor of 20:1 effectively implies a "purchase price" of 20 years' pension income for the lump sum. Someone who lives another 30 years in retirement would generally be better off retaining the income. Someone with a serious health condition or who has other capital needs might benefit from commutation.

Separate lump sum vs commutation: Some 1/80th schemes provide a separate automatic lump sum (typically 3 × pension) that does not require commutation. In these schemes, commutation is available on top of the automatic lump sum. For members of these schemes, commutation reduces both the pension AND the separate lump sum — check your scheme booklet.

Pension commencement lump sum limits: Post-LTA abolition, the total PCLS (pension commencement lump sum, including any amounts generated by commutation) is subject to the lump sum allowance of £268,275. For members of schemes with a generous separate lump sum, this cap becomes relevant.

Added Years and Additional Voluntary Contributions

Added years (also called additional pension units or augmentation) allow members to buy additional DB service credit within the scheme. This is a scheme-specific product and not available in all DB arrangements. The cost is typically actuarially calculated and is usually higher than open-market pension prices because the guaranteed nature of DB benefits commands a premium.

Added years purchased via AVC are very cost-effective in schemes with strong sponsor covenants (like public sector schemes) because the employer bears the investment and longevity risk on the enhanced benefit. For a 50-year-old with limited salary growth, buying added years in a public sector scheme is often excellent value.

DC AVCs alongside DB accrual: Many DB schemes have an associated defined contribution AVC vehicle operated by an insurance company. Members can contribute to the AVC alongside DB accrual. AVC funds can then be used to generate additional tax-free cash at retirement (up to the PCLS limit) or taken as pension income.

Section 75 Debt on Winding Up

When a DB scheme winds up or the sponsoring employer becomes insolvent, the scheme's obligations to members crystallise. Section 75 of the Pensions Act 1995 creates an employer debt equal to the full buy-out cost of members' benefits — typically higher than the ongoing funding level.

For members, winding up means:

• Benefits are secured with an insurance company (buyout), which then pays the promised pension
• If the scheme is underfunded and the employer cannot meet the Section 75 debt, members' benefits may be reduced to the Pension Protection Fund (PPF) compensation levels
• PPF pays 90% of benefit for members below normal pension age at the assessment date and 100% for those already drawing a pension. (The former PPF compensation cap for higher earners was removed after Hughes v PPF (2021) and is no longer applied.)

Understanding Section 75 is important context for assessing the security of any DB promise. A DB pension from a well-funded public sector scheme carries essentially no insolvency risk; a DB pension from a struggling private sector employer may carry meaningful risk.

How Global Investments Can Help

Global Investments advises individuals holding defined benefit entitlements from multiple employers on how to understand, value, and make decisions about their accrued rights. Whether you are approaching retirement and considering commutation options, a deferred member assessing a transfer value, or an expat trying to model a public sector pension alongside overseas assets, our advisers can help you navigate the complexity. Understanding your DB accrual mechanics is the foundation for every subsequent retirement income decision. Contact our team to arrange a pension review.

This guide is for information only and does not constitute financial or tax advice. Pension scheme rules and legislation can change. The value of pensions can fall as well as rise. Always seek regulated financial advice tailored to your circumstances.