Starting a Pension in Your 20s — Why Every Year You Wait Costs More Than You Think

"I'll start when I'm earning more." It's the most common reason Irish people in their 20s give for not having a pension — and it's usually a disguised version of "retirement is too far away to feel real."

The numbers make the case better than the argument. Here's what compound interest actually does over a 40-year horizon, and why the first decade of contributions is disproportionately powerful.

The Core Maths — Two Investors

Take two people, both earning €40,000 at age 25 and working to age 66. Both contribute €200/month to a pension (€2,400/year) growing at 5% annually in real terms. The only difference is when they start.

	Starts at 25	Starts at 35
Years contributing	41	31
Total personal contributions	€98,400	€74,400
Fund at 66 (5% growth)	~€303,000	~€171,000
Difference	~€132,000 — from 10 extra years and €24,000 more contributions

The person who started at 25 contributed €24,000 more over their career. They ended up with €132,000 more. That extra €132,000 came overwhelmingly from the compounding of the first decade's contributions — money invested in your mid-20s has 40 years to grow.

The same €200/month invested at 25 is worth approximately twice as much at retirement as the same €200/month invested at 35. The first €1 you put in at age 25 has 41 years to compound; the first €1 at 35 has 31 years. That 10-year difference, at 5% compounding, multiplies the value of early contributions by a factor of roughly 1.6.

The Tax Relief You're Leaving Behind

Irish pension tax relief makes the 20s argument even stronger. Revenue allows contributions of up to 15% of earnings with full income tax relief for under-30s. On a €40,000 salary at the 20% tax rate:

• You contribute €200/month (€2,400/year)
• Tax relief means the net cost to you is €160/month (€1,920/year) — Revenue pays the other €480
• If your employer matches contributions, even at a modest 5% match, you're getting an additional €167/month into the fund

The employer match is effectively a pay rise you're turning down if you don't participate. A 5% employer match on a €40,000 salary is €2,000/year — money that goes into your pension whether you contribute or not, as long as you're contributing. Not taking it is leaving €2,000 of annual compensation on the table.

My Future Fund — Does That Count?

If you were auto-enrolled in My Future Fund in 2026, you already have something. Phase 1 contributions (3.5% total from you, employer, and State) on a €40,000 salary amount to about €1,400/year into the fund. That's a start but it's not enough on its own.

The case for a supplemental PRSA alongside My Future Fund is stronger for people in their 20s who want to take full advantage of the Revenue tax relief their age band allows. My Future Fund maxes out at 6% of your own contributions (Phase 4, from 2035); Revenue allows up to 15% of earnings with full relief for under-30s. The gap between those two numbers is worth filling.

The "But I Have a Mortgage to Save For" Objection

This is a real tension and there's no right answer that works for everyone. A few things worth factoring in:

• The Help to Buy scheme (for first-time buyers of new builds) and the First Home Scheme both have income tax bases — your gross salary determines what you qualify for. Pension contributions reduce your taxable income but not your gross salary, so they don't affect HTB eligibility calculations the same way.
• You don't have to choose between saving for a mortgage and starting a pension. Even €50/month started at 25 is better than €0 — and the behavioural habit of saving into a pension is easier to build at 25 than at 40.
• Most Irish mortgage lenders treat pension contributions positively in affordability assessments — they're evidence of financial discipline, not a liability.

What "Starting Small" Actually Looks Like

You don't need to contribute 15% of your salary from day one. Revenue's age bands give you room to grow into higher contribution rates. Starting small and increasing contributions as salary rises is a completely valid strategy.

Monthly contribution	Annual cost at 20% tax relief	Annual cost at 40% tax relief	Fund at 66 (5% growth, starting at 25)
€100/month	€960/year	€720/year	~€152,000
€200/month	€1,920/year	€1,440/year	~€303,000
€400/month	€3,840/year	€2,880/year	~€606,000

The €100/month row is achievable for almost any full-time Irish worker in their mid-20s. At 20% tax relief, the after-tax cost is €80/month — less than a gym membership and two restaurant meals. The outcome after 41 years of compounding is €152,000 in today's money — on top of whatever State Pension you're entitled to.

The One Thing to Do Today

If your employer runs a pension scheme and you're not enrolled: enrol. Even if you contribute the minimum. The employer match alone makes it worthwhile, and you can increase contributions later. If your employer doesn't run a scheme, open a PRSA — any of the five major providers (Irish Life, Aviva, Zurich, Standard Life, New Ireland) will process an application online in under 30 minutes. Start at a contribution level you can sustain, not the maximum.