Pension Planning UK 2026/27 — How Much You Need and How to Get There

Pension vs Mortgage Overpayment — Which Should You Prioritise?

Should you put extra money into your pension or overpay your mortgage? We compare the tax benefits, returns, and flexibility to help you decide.

· · Last reviewed: · 5 min read

Pension information is based on current UK legislation. Pensions are regulated by the FCA and The Pensions Regulator. This is not financial advice — consider consulting an FCA-regulated financial adviser.

If you are mapping retirement targets, contribution strategy, and consolidation decisions together, use the Pension Planning Hub as your central guide.

It’s one of the most common financial dilemmas: should spare money go into your pension or towards overpaying your mortgage? Both are excellent uses of money, but the right answer depends on your tax band, mortgage rate, age, and financial goals.

Quick Comparison

FactorPensionMortgage overpayment
Tax relief20%–45% + employer matchNone
Guaranteed returnNo — market dependentYes — equal to your mortgage rate
RiskMarket volatilityZero
AccessLocked until age 55 (57 from April 2028)Reduces monthly payments or term
Emotional benefitAbstract (decades away)Tangible debt reduction
Employer matchYes — free moneyNo
InheritanceIncome Tax-efficient (usually free of Income Tax); Inheritance Tax-free until April 2027 — see note belowProperty included in estate

Note on inheritance: from 6 April 2027, most unused pension funds will be brought into your estate for Inheritance Tax purposes under the Finance Act 2026, reducing (but not eliminating) pensions’ current IHT advantage. This does not affect the Income Tax treatment on death before/after age 75, which continues as described in our pension death before 75 guide.

The Case for Pension Contributions

Tax Relief

Tax bandYou contributeTax reliefIn your pensionEffective cost
Basic (20%)£80+£20£100£80 per £100
Higher (40%)£60+£40£100£60 per £100
Additional (45%)£55+£45£100£55 per £100

With salary sacrifice, you also save National Insurance (8% employee, 15% employer), making the effective boost even larger.

Employer Match

Your contributionEmployer matchTotalInstant “return”
5% of salary5% of salary10%100% return before investment
5% of salary3% of salary8%60% return

This is the single most important factor. If your employer matches contributions, you should always contribute enough to get the full match before considering mortgage overpayments.

Compound Growth Over Time

£100/month into a pension growing at 5% per year:

AfterValueTotal contributionsGrowth
10 years~£15,500£12,000£3,500
20 years~£41,000£24,000£17,000
30 years~£83,000£36,000£47,000

With 40% tax relief (higher rate), the net cost of £100/month is only £60/month.

The Case for Mortgage Overpayment

Guaranteed, Tax-Free Return

Mortgage rateGuaranteed returnRisk
3%3%Zero
4%4%Zero
5%5%Zero
6%6%Zero

There’s no investment that offers a guaranteed, risk-free, tax-free return of 5%+.

Interest Savings

Overpaying £200/month on a £200,000 mortgage at 5% over 25 years:

Without overpaymentWith £200/month overpayment
Total interest: ~£150,000Total interest: ~£104,000
Mortgage-free in 25 yearsMortgage-free in ~17 years
Interest saved:~£46,000

Emotional and Psychological Benefits

  • Clear, simple goal — watching your balance fall
  • Reduces financial vulnerability (lower payments if remortgaging)
  • Being mortgage-free is one of the biggest factors in financial security
  • Reduces stress and improves resilience to income shocks

Side-by-Side Analysis

Scenario: £200/month spare cash, higher rate taxpayer, 5% mortgage rate

OptionWhat happens
All into pension£200 costs you £120 after tax relief. With 5% growth over 20 years: ~£82,000 pension pot. 75% taxable on withdrawal
All into mortgageSaves ~£46,000 in interest. Mortgage-free 8 years early. Guaranteed.
Split 50/50£100 pension + £100 mortgage. Best of both worlds

After-Tax Pension Returns vs Mortgage

Mortgage ratePension must beat (after tax on withdrawal)
3%~2% (pension tax relief makes this easy)
4%~3.5%
5%~5% (closer — but tax relief and employer match push pension ahead)
6%~6.5% (mortgage overpayment looks very attractive)

At high mortgage rates (6%+), the guaranteed return from overpayment becomes very competitive with pension contributions (excluding employer match).

Decision Framework

Always Prioritise Pension If:

SituationWhy
Employer offers matching you’re not takingFree money — instant 50-100%+ return
You’re a higher or additional rate taxpayer40-45% tax relief is extremely valuable
You’re under 40Decades of compound growth ahead
You have a low mortgage rate (<4%)Pension returns likely beat mortgage savings
You haven’t maxed pension annual allowance£60,000/year allowance (2026/27) — use it

Prioritise Mortgage Overpayment If:

SituationWhy
Already getting full employer pension matchFree money is captured
High mortgage rate (5%+)Guaranteed high return
Within 10 years of paying off mortgageTangible, achievable goal
Already contributing significantly to pensionDiversifying your strategy
You value certainty over potential growthGuaranteed vs market risk
Close to retirementLess time for pension growth; reduce costs

The Optimal Strategy for Most People

PriorityAction
1Get the full employer pension match — this is non-negotiable
2Build a 3-6 month emergency fund
3Pay off high-interest debt (credit cards, loans)
4Split surplus between pension and mortgage overpayments
5If mortgage rate is low (<4%), lean towards pension. If high (5%+), lean towards mortgage

Practical Split

Mortgage rateSuggested split
Under 3%80% pension / 20% mortgage
3%–4%70% pension / 30% mortgage
4%–5%50% pension / 50% mortgage
5%–6%40% pension / 60% mortgage
Over 6%30% pension / 70% mortgage (after employer match)

Things to Check Before Overpaying

CheckDetail
Overpayment limitMost mortgages allow 10% per year without early repayment charge
Early repayment chargesFixed-rate mortgages may charge 1%–5% for overpayments above the limit
Offset mortgageIf you have one, savings offset the mortgage directly — overpayment happens automatically
Flexible mortgageMay allow unlimited overpayments

Summary

QuestionAnswer
Which has better returns?Pension (with tax relief and employer match)
Which is guaranteed?Mortgage overpayment
Which should come first?Pension (to get employer match)
Best approach?Both — split surplus after employer match
High mortgage rate?Lean more towards overpayment
Low mortgage rate?Lean more towards pension

Sources

  1. HMRC — Tax relief on pensions