ill health pension lump sum calculator

If you are searching for an ill health pension lump sum calculator, you probably want one practical answer: how much cash can I take now, and what does it do to my pension income? This page gives you a fast estimate using common UK defined benefit pension rules.

How this calculator works

This tool estimates your figures using four inputs:

• Your annual pension before taking extra lump sum
• Your scheme's automatic lump sum multiplier (if any)
• Your commutation factor
• The percentage of additional tax-free cash you choose to take

It then calculates:

• Automatic lump sum
• Capital value (using a factor of 20x annual pension, as commonly used in tax calculations)
• Maximum tax-free lump sum (25% of capital value)
• Extra lump sum available above automatic cash
• Annual pension given up to create that extra cash
• Remaining annual and monthly pension

Understanding ill health retirement lump sums

1) Automatic lump sum

Some legacy public sector and occupational schemes pay a built-in lump sum when pension starts. If your rules say “3 times pension,” your automatic multiplier is 3.

2) Optional (commuted) lump sum

Many schemes let you exchange part of your annual pension for additional tax-free cash. This is called commutation. The commutation factor decides how much cash you get per £1 of pension given up.

3) Ill health enhancement

In some schemes, ill health retirement can increase your pensionable service or accrual. That can increase both your starting pension and your possible lump sum. Because these rules differ by scheme and tier, this calculator focuses on the pension amount you already have in hand.

Important assumptions

Worked example

Suppose your annual ill health pension is £18,000, your scheme gives an automatic lump sum of 3x pension, and your commutation factor is 12.

• Automatic lump sum: £54,000
• Capital value: (20 × £18,000) + £54,000 = £414,000
• Maximum tax-free amount: 25% × £414,000 = £103,500
• Maximum additional cash: £103,500 − £54,000 = £49,500
• Pension given up for max additional cash: £49,500 ÷ 12 = £4,125/year
• Remaining annual pension: £13,875

The calculator automates this in seconds and lets you model partial choices (for example, taking only 50% of available additional cash).

Common mistakes to avoid

Using the wrong commutation factor

Factors can vary by age and scheme section. A small change in this number can meaningfully change your result.

Confusing gross with net pension income

Your remaining pension is typically quoted before income tax. Always consider your expected net monthly income.

Ignoring survivor benefits

In some schemes, the way survivor pensions are calculated may be affected by commutation choices. Check your handbook.

Assuming all schemes work the same way

NHS, LGPS, Teachers', Civil Service, police, and private DB schemes can have different ill health tiers and retirement terms.

Before making a final decision

• Request a formal retirement illustration from your pension administrator.
• Ask for different commutation scenarios (0%, 50%, 100% of optional cash).
• Compare one-off cash needs with long-term income security.
• Speak with a regulated adviser if you are unsure.

FAQ

Is this an official ill health retirement calculator?

No. It is an educational estimator. Your provider's quote and scheme rules always override this result.

Can I use this for any pension?

It is designed for defined benefit-style pensions where commutation and tax-free cash rules apply. It is not intended for drawdown planning in defined contribution pensions.

Why does taking more lump sum reduce pension?

Because additional cash is usually created by exchanging (commuting) part of your annual pension income.