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HomeFinance & SavingsUK Pension Drawdown & Capital Depletion Calculator 2026/27
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UK Pension Drawdown & Capital Depletion Calculator 2026/27

Forecast how many years your UK pension pot will last under flexi-access drawdown, inflation rate increases, and investment growth.

Pension Drawdown & Pot Depletion Details

Initial Pension Pot Balance (£)
£
Annual Net Income Drawdown Income (£/year)
£
Estimated Investment Return Rate (% p.a.)
%
Annual Inflation Rate (% p.a.)
%
Estimated Pension Pot Longevity
24.5 Years
Depletion Age Target: Pot Lasts to Age 89 (From Age 65)

📊 Drawdown Depletion Breakdown

Initial Pension Fund Pot £350,000.00
Initial Withdrawal Rate 6.00% p.a. (£21,000/yr)
Net Investment Growth (Return - Inflation) 2.00% Real Return
Estimated Fund Depletion Horizon 24.5 Years

Under the UK Pension Freedom regulations introduced in 2015, individuals aged 55 and over (rising to 57 in 2028) can access their defined contribution (DC) pension pots flexibly using Flexi-Access Drawdown.

While flexi-access drawdown provides flexibility to withdraw variable monthly income while keeping remaining capital invested in stocks and bonds, it introduces capital depletion risk (the risk of outliving your money). How long your pension pot lasts depends on your initial withdrawal rate, market investment returns, asset allocation, and annual inflation adjustments.

⚙️ Rules & Thresholds

  • Tax-Free Lump Sum: Up to 25% of your total pension pot can be taken tax-free (subject to the £268,275 lifetime Lump Sum Allowance). The remaining 75% is taxed as income when drawn down.
  • The 4% Safe Withdrawal Rule: A financial benchmark suggesting that withdrawing 4% of your starting pot value in year 1, adjusted annually for CPI inflation, gives a high probability of your pot lasting 30 years.
  • Sequence of Returns Risk: Experiencing stock market downturns in the early years of retirement significantly increases the rate of capital depletion because withdrawals consume more shares at depressed prices.
  • Money Purchase Annual Allowance (MPAA): Accessing taxable income from your drawdown pot triggers the reduced £10,000 MPAA, capping future tax-relieved pension contributions.

📊 Practical Examples

Example 1: £250,000 Pension Pot with £1,200 Monthly Drawdown (£14,400/Year)
  • Starting Pot: £250,000
  • Target Drawdown: £1,200 / month (£14,400 / year)
  • Initial Withdrawal Rate: 5.76% per annum (£14,400 / £250k)
  • Investment Return: 5.0% per annum
  • Inflation Rate: 2.5% per annum

Simulation Result: Due to an initial 5.76% withdrawal rate exceeding real net returns (2.5%), the pot depletes over time.
Pot Longevity: **24.5 Years** (Pot exhausts around age 89.5 if started at age 65).

Pot Longevity: 24.5 Years (Remaining Balance at Age 85: £52,410)

📑 Common Pitfalls

  • Withdrawing Too Much in Early Years: Taking an initial withdrawal rate above 6% rapidly accelerates capital depletion, especially if early market returns are negative.
  • Ignoring Inflation Inflation Adjustments: Failing to inflation-adjust annual drawdown means your real purchasing power will drop by over 30% after 15 years at 2.5% inflation.
  • Triggering the Money Purchase Annual Allowance (MPAA) Unintentionally: Taking a single taxable drawdown payment permanently restricts your maximum future pension contribution allowance to £10,000 per tax year.

❓ Frequently Asked Questions (FAQ)

Flexi-Access Drawdown is a UK pension income option that allows you to take income directly from your pension pot as and when you need it, while leaving the remaining balance invested in the financial markets to grow. You can take up to 25% of your pot tax-free, while further withdrawals are taxed as normal income.

Sequence of returns risk refers to the risk that market downturns occur in the early years of your retirement. Withdrawing fixed monthly income during a market crash forces you to sell more investment units at lower prices, permanently reducing your pot's ability to recover when markets rebound.

The first 25% of your pension pot is tax-free. The remaining 75% of withdrawals are added to your other annual income (such as State Pension or employment earnings) and taxed at your marginal UK Income Tax rates (20%, 40%, or 45%).

Yes. You are not locked into flexi-access drawdown forever. You can use all or part of your remaining drawdown pot at any age to purchase a guaranteed lifetime annuity from an insurance provider, locking in a secure income for the rest of your life.