LISA at 25 vs at 39: How Many Extra Free £1,000s You Can Stack
Open a Lifetime ISA at 25 and you could claim up to £25,000 in government bonuses by the time you buy your first home or turn 60. Wait until 39 and the maximum drops to £11,000. Here's the real maths of starting early.
What the LISA Bonus Actually Pays Per Year
The Lifetime ISA bonus is simple in structure:
- Contribute £1 → HMRC adds 25p
- Maximum contribution: £4,000/year
- Maximum bonus: £1,000/year
- Bonus paid: monthly (by 8th–10th of the following month)
The bonus counts toward the pot and grows with it. In a Stocks & Shares LISA, each monthly bonus instalment is invested immediately — so earlier bonuses compound for longer.
The Key Numbers: Opening Age vs Maximum Lifetime Bonus
| Age you open LISA | Years you can contribute | Max contributions (£4,000/yr) | Max government bonus | Extra vs opening at 39 |
|---|---|---|---|---|
| 18 | 32 | £128,000 | £32,000 | +£21,000 |
| 21 | 29 | £116,000 | £29,000 | +£18,000 |
| 25 | 25 | £100,000 | £25,000 | +£14,000 |
| 30 | 20 | £80,000 | £20,000 | +£9,000 |
| 35 | 15 | £60,000 | £15,000 | +£4,000 |
| 39 | 11 | £44,000 | £11,000 | — (baseline) |
You stop contributing the year before you turn 50 — so a 25-year-old contributes in ages 25, 26, 27 … 49 inclusive = 25 tax years.
The Case Study: 25-Year-Old vs 39-Year-Old
Let's follow two people, both saving the maximum £4,000/year into a Stocks & Shares LISA at 7% annual growth. We'll compare where they stand at age 60 (first accessible for retirement).
Person A: Opens LISA at 25
| Period | Own savings | HMRC bonus | Total invested | Value at 60 (7% growth) |
|---|---|---|---|---|
| Age 25–49 (25 yrs) | £100,000 | £25,000 | £125,000 | ~£570,000 |
Person B: Opens LISA at 39
| Period | Own savings | HMRC bonus | Total invested | Value at 60 (7% growth) |
|---|---|---|---|---|
| Age 39–49 (11 yrs) | £44,000 | £11,000 | £55,000 | ~£138,000 |
Difference at age 60: ~£432,000 — for the same £4,000/year saved.
Person A contributed £56,000 more of their own money over 25 years vs 11 years — but even adjusting for that, the compounding gap is enormous. The extra 14 years of bonus growth alone accounts for a substantial portion.
Year-by-Year: What Person A's LISA Looks Like
Opening LISA at 25, maxing £4,000/year, 7% annual return:
| End of age | Cumulative own savings | Cumulative HMRC bonus | Fund value (7% growth) |
|---|---|---|---|
| 25 | £4,000 | £1,000 | £5,350 |
| 30 | £24,000 | £6,000 | £36,400 |
| 35 | £44,000 | £11,000 | £83,400 |
| 40 | £64,000 | £16,000 | £155,000 |
| 45 | £84,000 | £21,000 | £264,000 |
| 49 | £100,000 | £25,000 | £375,000 |
| 60 | No new contributions | ~£570,000 |
Growth continues 7%/year from age 50 to 60 with no new contributions.
Using the LISA for a First Home Purchase
The LISA can also be used to buy a first home — this is where the early-opening advantage compounds differently:
| Person A (opens at 25) | Person B (opens at 39) | |
|---|---|---|
| Saving for 5 years before purchase | Saves £20,000, bonus £5,000 = £25,000 deposit fund | Saves £20,000, bonus £5,000 = £25,000 deposit fund |
| Bonus stack in 5 years | Identical | Identical |
For home purchase only (5-year saving horizon), both savers get the same benefit if they save identically in that period. The difference is that Person A could have been stacking bonus years before deciding to buy — and then switch to using it for retirement if property plans change.
The Rule That Catches People: Property Must Be £450,000 or Less
The LISA bonus is forfeited entirely for a property purchase above £450,000. This is a hard limit set when LISAs were introduced in 2017. In many parts of England (especially London and the South East), this cap means the LISA isn't usable for the actual property you intend to buy.
| Scenario | LISA usable for property? |
|---|---|
| First home purchase, £350,000 | ✅ Yes |
| First home purchase, £449,999 | ✅ Yes |
| First home purchase, £450,001 | ❌ No — must not exceed £450,000 |
| Existing property owner buying again | ❌ No |
If the property is above the limit and you're not yet 60, withdrawing from a LISA incurs the 25% penalty.
The Withdrawal Penalty: It's Not Just Returning the Bonus
This is widely misunderstood. The 25% withdrawal penalty sounds like it just takes back the 25% bonus — but the maths shows you also lose some of your own money:
| You save | HMRC bonus | Total in LISA | 25% penalty | You receive | Loss vs original |
|---|---|---|---|---|---|
| £4,000 | £1,000 | £5,000 | −£1,250 | £3,750 | −£250 of own savings |
| £20,000 | £5,000 | £25,000 | −£6,250 | £18,750 | −£1,250 of own savings |
The penalty effectively returns the bonus plus 6.25% of your own contributions. This is why withdrawing from a LISA for any reason outside the three qualifying scenarios is painful.
Exception: the penalty was temporarily reduced to 20% during COVID (2020–2021) and there is a live consultation on changing the penalty structure — but as of 2025/26, it remains 25%.
LISA vs Pension: Where Each Wins
| Factor | LISA | Workplace pension |
|---|---|---|
| Government top-up | +25% bonus | +20% basic-rate tax relief (or more) |
| Employer contribution | None | Employer must contribute ≥3% (auto-enrolment) |
| Higher-rate tax relief | No | Yes — through Self Assessment or net-pay |
| Annual contribution limit | £4,000 | £60,000 (2025/26) |
| Accessible from | Age 60 | Age 57 (from 2028) |
| Withdrawals from retirement | Tax-free | 25% lump sum tax-free; rest taxed as income |
| Use for first home | ✅ Yes (if ≤£450k) | ❌ No |
For most employed people: maximise pension (especially if employer matches) before LISA. The employer contribution is free money the LISA can't replicate. But if you've maxed employer match and want more tax-efficient saving, a LISA is a strong second option — especially if you're 25 and have 25 bonus years ahead of you.
Practical Steps to Open a LISA
- Check you're aged 18–39 (you must not have turned 40)
- Choose a provider: Moneybox, AJ Bell, Hargreaves Lansdown, Nutmeg (for S&S LISA); Paragon, Skipton (for Cash LISA)
- Set up regular monthly contributions (up to £333.33/month = £4,000/year)
- The 25% bonus is automatically added by HMRC — you don't need to claim it
- If buying a first home, inform your conveyancer — the LISA funds must be transferred directly to solicitors, not to you
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