An Ireland-localised calculator pre-filled in EUR. Use it to model growth inside a PRSA, Employer Pension, or EIIS-eligible investment over typical Irish working-life horizons.
A €10,000 PRSA balance plus €500/month at 7% for 25 years grows to about €415,000 — but Irish exit tax on non-pension fund growth (currently 41%) can take a sizeable bite if held outside a pension.
Ireland's deemed disposal rule means many ETFs held outside a pension are taxed every 8 years on unrealised gains — a friction that makes pension wrappers (PRSA, occupational) more attractive than they would be elsewhere.
Compound interest is interest earned on interest. Each period, your balance grows by the previous balance times the periodic rate, then your contribution is added. Over decades the compounded portion dwarfs the contributed portion — the "hockey stick" curve every personal-finance article keeps showing you.
P is your starting amount. PMT is each monthly contribution. r is the monthly rate (annual ÷ 12). n is the total number of months.
In an Irish context: inside a PRSA or occupational pension, growth is tax-deferred and contributions attract income-tax relief up to age-banded limits. Outside a pension, the PRSA or EIIS route matters: Irish ETF holders face 41% exit tax and deemed disposal every 8 years, significantly eroding compounding. Model non-pension savings with a noticeably lower effective return.
Important: figures are nominal — they don't subtract Irish inflation. To see real growth, subtract a 2–3% estimate from your return assumption.
Compound interest is interest earned on both your original deposit AND on the interest already credited. It causes balances to grow faster over time — the longer you leave money invested, the more dramatic the effect.
Future Value = Principal × (1 + r)n + PMT × ((1 + r)n − 1) / r, where r is the periodic interest rate (annual rate ÷ 12 for monthly compounding) and n is the total number of periods.
For a globally-diversified equity fund inside a PRSA, 6–8% annualised is a common historical assumption. Irish money market and bond funds run lower. The calculator does not promise any specific return — model multiple scenarios.
No — figures are nominal. To see real (after-inflation) growth, subtract an Irish CPI estimate (typically 2–3%) from your assumed return rate.
Inside a PRSA or occupational pension, growth is tax-deferred and contributions get income-tax relief up to age-banded limits. Outside a pension, Irish ETFs face 41% exit tax with deemed disposal every 8 years — model with a noticeably lower effective return rate if you are saving in a brokerage account.
ProFinanceCast turns one-off calculations into a living 10-year forecast that updates as your income, expenses, and goals change. Free forever for the core forecast.