UK Pension Growth Calculator 2026

Free UK pension growth calculator for 2026. Model pension growth using salary sacrifice, auto-enrolment, tax relief and inflation. Estimate retirement income, sustainable drawdown and tax-free lump sum across England, Scotland, Wales and Northern Ireland.

Last revised 1 September 2026

By Team GlobalCalqulate · About our editorial standards

Your Details

Current age

Planned retirement age

Current Pension

Current pension pot

Contributions

Your monthly contribution

The amount paid into the pot each month, including any basic-rate tax relief your provider adds.

Employer monthly contribution

Growth Assumptions

Expected annual return (%)

After provider and fund charges. Compounded monthly at one twelfth of this rate.

Expected inflation rate (%)

How this estimate was calculated

Illustration based on the assumptions you entered, not a forecast or a guaranteed outcome. The annual return is compounded monthly at one twelfth of the rate (so the effective yearly growth is slightly higher), and contributions are assumed to be paid at the end of each month. Enter returns after provider and fund charges, and contributions including any basic-rate tax relief added to the pot.
The State Pension, income tax on withdrawals and the Annual Allowance are not included. Only the 25% tax-free element is capped, by the Lump Sum Allowance.
The 4% annual income figure is a common rule-of-thumb planning assumption, not a guarantee: a sustainable withdrawal rate depends on investment returns, inflation and how long the pot needs to last.

Financial Disclaimer: This result is an educational estimate produced by applying published rates and thresholds to the figures you entered. It is not a tax determination: your actual liability depends on circumstances this calculator does not collect. Confirm your position with the relevant tax authority or a qualified accountant before acting on it. Full disclaimer.

Sources & methodology

Formula:: Growth of your current pot
Reference:: HM Revenue & Customs (GOV.UK)
Rates for:: 2026/27
Figures verified:: August 2026 — checked against the primary source above
Scheduled re-verification:: April 2027

Calculation type: Projection from your assumptions. Uses 2026/27 rates and thresholds. Figures are taken from HM Revenue & Customs (GOV.UK) — see sources below.

Reviewed by Team GlobalCalqulate — Verifies each figure against the issuing authority's published source · Checked 16 August 2026

Your entries stay on this device. This calculator runs entirely in your browser — the figures you type are not sent to us or to anyone else. The page itself uses cookies for analytics and advertising, described in the privacy policy.

Formula & methodology

Formula used

Growth of your current pot

FV = P × (1 + r)^n

P is your pot today, r the monthly return (annual ÷ 12) and n the months until your stated retirement age.

Growth of your contributions

FV = C × ((1 + r)^n − 1) ÷ r

C combines your personal and employer monthly contributions, since both are paid into the same pot. Each contribution compounds for the months remaining after it is paid in.

Value in today's money

real value = projected pot ÷ (1 + i)^n

Discounting by inflation shows what the pot would buy at today's prices — over a multi-decade term this is usually far lower than the headline figure, and it is the more meaningful number for planning.

Tax-free lump sum

lump sum = min(pot × 25%, Lump Sum Allowance)

Normally a quarter of the pot can be taken tax-free, but the amount is capped by the Lump Sum Allowance. The calculator flags when the cap is what limits you rather than the 25%.

Indicative retirement income

annual income ≈ pot × 4%

A widely used planning rule of thumb for a sustainable withdrawal rate — a starting point for discussion, not a guaranteed income.

Step-by-step calculation

1. Work out the time to retirement
Retirement age less current age, converted to months.
2. Compound the existing pot forward
At the monthly equivalent of your assumed annual return.
3. Compound personal and employer contributions
Combined and grown as a monthly annuity.
4. Discount for inflation
To express the projected pot in today's purchasing power.
5. Derive the lump sum and indicative income
Applying the 25% tax-free fraction subject to its cap, and the 4% withdrawal rule.

Limitations

This is a projection built on assumptions you choose, not a forecast. Real returns vary year to year and can be negative; a poor sequence of returns near retirement damages a pot far more than the same average return earlier.
Contributions are assumed flat in cash terms for the whole period. In reality they usually rise with salary, which this does not model — nor does it model career breaks, or stopping and restarting contributions.
Provider, platform and fund charges are not deducted, and over decades these materially reduce the final pot.
The 4% figure is a rule-of-thumb planning assumption drawn from historical US data. It is not a guarantee, and a sustainable withdrawal rate depends on returns, inflation, charges and how long the money must last.
The State Pension, defined benefit entitlements and any other pensions you hold are not included in the projection.
Tax on income drawn in retirement, the Annual Allowance, the tapered and money purchase annual allowances, and tax relief on contributions going in are not modelled.
This is an illustration, not financial advice, a guarantee of investment performance, or a statement of what your provider will pay.

This page is educational. It projects a future value from assumptions you choose, and a projection is not a forecast: real returns vary year to year, and the rules, limits and rates used here can change before the period modelled ends. Treat the output as one scenario among many, not a prediction of what you will have.

Sources & references

Tax on your private pension contributions — HM Revenue & Customs (GOV.UK)

Help & FAQs

Frequently Asked Questions

Clear answers to common questions to help you use this calculator confidently.

How much pension will I have at retirement?

Tap to view the answer

Enter your current pension balance, monthly contributions, and expected annual growth rate to estimate your projected pot in GBP. Running low, base, and high growth scenarios rather than relying on one number shows the long-term impact of consistency.

Does pension planning differ across the UK (England, Scotland, Wales, Northern Ireland)?

Tap to view the answer

The growth maths is the same across the UK, but cost of living and retirement spending needs differ by region, and housing and healthcare-related costs can influence your required income. The focus here is pension accumulation projections in GBP (£).

What are the most common pension mistakes people make?

Tap to view the answer

A major one is contributing too little early on and assuming you can catch up later. Another is ignoring fees and inflation, which erode real buying power. Seeing how small delays cost years of growth helps you act sooner.

How does FCA guidance relate to pension planning?

Tap to view the answer

FCA-aligned consumer guidance encourages understanding risk, fees, and long-term outcomes before making investment decisions. Making the assumptions visible and comparable supports that, but it isn't official FCA advice and shouldn't replace regulated financial advice.

How do Bank of England interest rates affect pensions?

Tap to view the answer

Rate changes can influence bond prices, annuity rates, and broader investment conditions. The calculator doesn't forecast those shifts, but it lets you test different growth scenarios — re-checking yearly keeps retirement planning realistic.

Need more help? Contact support or email globalcalqulate@gmail.com

We typically reply within 24–48 hours.

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How to Use This Calculator

Enter your age

Provide your current age and expected retirement age.

Add current savings

Enter the value of your existing pension pot.

Set contributions

Include both your own and employer monthly contributions.

Adjust growth assumptions

Change expected return and inflation if you want conservative or optimistic projections.

Understanding Your Results

Estimated pension pot
Total value of your pension at retirement before withdrawals.
Inflation-adjusted value
Shows today’s purchasing power of your future pension.
Tax-free lump sum
Up to 25% of your pot you can usually take tax-free.
Illustrative annual income
4% of the projected pot, before income tax, shown in future money and again in today's money. A rule of thumb for illustration, not a guaranteed or advised income.

Understanding UK Pension Growth

How UK pension tax relief works

For every £80 you contribute, the government adds £20 (20% basic-rate relief). Higher earners get additional relief through self-assessment. This increases effective contributions from 5% to 6.25% (basic rate), making workplace pensions highly tax-efficient.

Workplace pensions and auto-enrolment

UK employers must automatically enrol eligible employees into a workplace pension. Minimum contributions total 8% of qualifying earnings: at least 3% from the employer and up to 5% from the employee (including tax relief). Auto-enrolment applies to employees aged 22 to State Pension age earning over £10,000 a year.

State Pension vs private pension savings

The full new State Pension is around £12,000/year (roughly £230/week) for those with a complete National Insurance record, payable from State Pension age. Private pensions (workplace, SIPP, ISA) supplement this. Most UK retirees need additional private savings to maintain lifestyle. Compound growth over 30+ years significantly boosts retirement income.

Tax-free lump sum and sustained yield withdrawal rules

At retirement, you can normally take up to 25% of your pension pot tax-free, subject to the Lump Sum Allowance. The remainder is taxed as income as you withdraw it. Planning withdrawals helps manage tax bills and preserve capital.

Inflation and real returns on pensions

If your pension grows at 6% but inflation is 2.5%, your real return is roughly 3.4%. Over 35 years, inflation erodes purchasing power significantly. Younger savers should consider inflation-linked assets to maintain real value of future retirement income.

SIPPs, ISAs and diversified retirement planning

SIPP (Self-Invested Personal Pension): for self-employed/higher earners, offers investment flexibility. Stocks & Shares ISA: tax-free growth, liquid access. Pensions + ISAs together = maxed-out tax-efficient retirement savings. ISAs lack pension tax relief but offer flexibility and simplicity.

Formula & methodology

Formula used

Growth of your current pot

FV = P × (1 + r)^n

P is your pot today, r the monthly return (annual ÷ 12) and n the months until your stated retirement age.

Growth of your contributions

FV = C × ((1 + r)^n − 1) ÷ r

C combines your personal and employer monthly contributions, since both are paid into the same pot. Each contribution compounds for the months remaining after it is paid in.

Value in today's money

real value = projected pot ÷ (1 + i)^n

Tax-free lump sum

lump sum = min(pot × 25%, Lump Sum Allowance)

Normally a quarter of the pot can be taken tax-free, but the amount is capped by the Lump Sum Allowance. The calculator flags when the cap is what limits you rather than the 25%.

Indicative retirement income

annual income ≈ pot × 4%

A widely used planning rule of thumb for a sustainable withdrawal rate — a starting point for discussion, not a guaranteed income.

Step-by-step calculation

1. Work out the time to retirement
Retirement age less current age, converted to months.
2. Compound the existing pot forward
At the monthly equivalent of your assumed annual return.
3. Compound personal and employer contributions
Combined and grown as a monthly annuity.
4. Discount for inflation
To express the projected pot in today's purchasing power.
5. Derive the lump sum and indicative income
Applying the 25% tax-free fraction subject to its cap, and the 4% withdrawal rule.

Limitations

This is a projection built on assumptions you choose, not a forecast. Real returns vary year to year and can be negative; a poor sequence of returns near retirement damages a pot far more than the same average return earlier.
Contributions are assumed flat in cash terms for the whole period. In reality they usually rise with salary, which this does not model — nor does it model career breaks, or stopping and restarting contributions.
Provider, platform and fund charges are not deducted, and over decades these materially reduce the final pot.
The 4% figure is a rule-of-thumb planning assumption drawn from historical US data. It is not a guarantee, and a sustainable withdrawal rate depends on returns, inflation, charges and how long the money must last.
The State Pension, defined benefit entitlements and any other pensions you hold are not included in the projection.
Tax on income drawn in retirement, the Annual Allowance, the tapered and money purchase annual allowances, and tax relief on contributions going in are not modelled.
This is an illustration, not financial advice, a guarantee of investment performance, or a statement of what your provider will pay.

Calculator inputs

Your Details

Current Pension

Contributions

Growth Assumptions

Your results

Sources & methodology

Formula & methodology

Formula used

Growth of your current pot

Growth of your contributions

Value in today's money

Tax-free lump sum

Indicative retirement income

Step-by-step calculation

Limitations

Sources & references

How much pension will I have at retirement?

Does pension planning differ across the UK (England, Scotland, Wales, Northern Ireland)?

What are the most common pension mistakes people make?

How does FCA guidance relate to pension planning?

How do Bank of England interest rates affect pensions?

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More United Kingdom calculators

Calculator inputs

Your Details

Current Pension

Contributions

Growth Assumptions

Your results

Sources & methodology

How to Use This Calculator

Example: Age 30, retiring at 67

Understanding Your Results

Key Tips

Understanding UK Pension Growth

How UK pension tax relief works

Workplace pensions and auto-enrolment

State Pension vs private pension savings

Tax-free lump sum and sustained yield withdrawal rules

Inflation and real returns on pensions

SIPPs, ISAs and diversified retirement planning

Formula & methodology

Formula used

Growth of your current pot

Growth of your contributions

Value in today's money

Tax-free lump sum

Indicative retirement income

Step-by-step calculation

Limitations

Sources & references

How to Use This Calculator

Example: Age 30, retiring at 67

Understanding Your Results

Key Tips

Understanding UK Pension Growth

How UK pension tax relief works

Workplace pensions and auto-enrolment

State Pension vs private pension savings

Tax-free lump sum and sustained yield withdrawal rules

Inflation and real returns on pensions

SIPPs, ISAs and diversified retirement planning