Irish Compound Interest Calculator
See how your savings grow with compound interest — project balances in EUR across different rates, contribution amounts, and compounding frequencies.
Compound Interest Calculator
Project investment growth — figures shown in EUR
Summary
Investment Summary
An initial investment of €10,000 with €500 contributed monthly at 6.0% annual interest (compounded monthly) grows to €100,134 over 10 years.
Total contributions add up to €60,000, with €30,134 earned in interest — including €6,134 of compound growth (interest earned on previously earned interest).
Growth Projection
Yearly Breakdown
Year-by-year contributions, interest and balance. Figures reflect the view setting (Future € or Today's €).
| Year | Contributions | Interest | Total Invested | Balance |
|---|---|---|---|---|
| 1 | €6,000 | €785 | €16,000 | €16,785 |
| 2 | €6,000 | €1,203 | €22,000 | €23,988 |
| 3 | €6,000 | €1,647 | €28,000 | €31,635 |
| 4 | €6,000 | €2,119 | €34,000 | €39,754 |
| 5 | €6,000 | €2,620 | €40,000 | €48,374 |
| 6 | €6,000 | €3,151 | €46,000 | €57,525 |
| 7 | €6,000 | €3,716 | €52,000 | €67,241 |
| 8 | €6,000 | €4,315 | €58,000 | €77,556 |
| 9 | €6,000 | €4,951 | €64,000 | €88,507 |
| 10 | €6,000 | €5,627 | €70,000 | €100,134 |
Scenario Comparison
How different choices affect the final balance, all using your selected period and rate.
Compounding Frequency Comparison
Same principal, contribution, rate and period — only the compounding frequency changes.
| Frequency | Final Value | Difference vs Annual |
|---|---|---|
| Annually | €99,145 | — |
| Semi-Annually | €99,674 | +€529 |
| Quarterly | €99,948 | +€802 |
| Monthly (current) | €100,134 | +€988 |
| Daily | €100,225 | +€1,079 |
Investment Milestones
Estimated time to reach common Irish savings and investment milestones, based on the inputs above.
When you'll reach common targets
| Target | Years | Estimated Year |
|---|---|---|
| €25,000 | 2.2 | 2029 |
| €50,000 | 5.3 | 2032 |
| €100,000 | 10.0 | 2036 |
| €250,000 | 19.4 | 2046 |
| €500,000 | 28.4 | 2055 |
| €1,000,000 | 38.5 | 2065 |
Ireland Investment Options
Common investment types available to Irish savers and investors, with typical historical returns and risk levels. Tap any option for detailed considerations.
Regular Savings Accounts
Very Low RiskDGS-protected savings from Irish and EU banks and credit unions. Government-guaranteed up to EUR 100,000 per person, per institution under the Deposit Guarantee Scheme administered by the Central Bank of Ireland.
Advantages
- DGS protected (EUR 100K)
- Easy access options
- No market risk
- Bonus rates on regular savers
Considerations
- Lower returns vs equities
- 33% DIRT on interest
- Rates can change
- Inflation erosion risk
Fixed-Term Deposits
Very Low RiskFixed-rate deposits locked in for a set term (3 months to 5 years). DGS protected up to EUR 100,000. Rate locked for the term regardless of ECB policy changes.
Advantages
- DGS protected
- Locked-in rate
- Predictable returns
- Various term options
Considerations
- Funds locked away
- Early-access penalties
- 33% DIRT applies
- Miss future ECB rate moves
Government Bonds & State Savings
Low–Medium RiskIrish Government bonds and An Post State Savings products (Prize Bonds, Savings Bonds, Savings Certificates, National Solidarity Bond). State Savings are DIRT-free and backed by the Irish State.
Advantages
- State Savings: DIRT-free
- Government backed
- Prize Bonds: prize element
- Very low default risk
Considerations
- Lower growth potential
- Investment limits apply
- Interest rate risk (bonds)
- Limited flexibility
Pension (Conservative)
Low–Medium RiskCapital-preservation pension allocation through PRSA, occupational scheme, or auto-enrolment "My Future Fund". Tax relief at the marginal rate (up to 40%) on contributions, capped at EUR 115,000 of earnings.
Advantages
- Up to 40% tax relief
- Tax-free fund growth
- Capital preservation focus
- Employer contributions (workplace)
Considerations
- Locked until retirement
- May not beat inflation long term
- Age-related % limits apply
- SFT EUR 2.2m (2026) cap
Gold & Precious Metals
Medium RiskPhysical investment-grade gold (no VAT), allocated gold accounts, or gold ETFs. Traditional inflation hedge and safe-haven asset, priced in USD/EUR. Capital gains taxable at 33% CGT (with EUR 1,270 annual exemption).
Advantages
- Inflation hedge
- Safe-haven asset
- No VAT on investment gold
- Portfolio diversification
Considerations
- No income / dividends
- Storage costs (physical)
- 33% CGT on gains
- Currency risk (USD priced)
Multi-Asset Funds
Medium RiskDiversified funds mixing equities, bonds, and alternatives, available through Irish life companies and fund platforms. Subject to Exit Tax at 38% (reduced from 41% in Budget 2026) and 8-year deemed disposal rules.
Advantages
- Built-in diversification
- Professional management
- Automatic rebalancing
- Central Bank-regulated
Considerations
- Exit Tax at 38%
- 8-year deemed disposal
- No loss offset against CGT
- Higher fees than ETFs
ETFs (UCITS)
Medium–High RiskLow-cost UCITS ETFs tracking the Euro Stoxx 50, MSCI World, or other indices. Trade on European exchanges. Irish-domiciled and equivalent EU/EEA/OECD ETFs are subject to Exit Tax at 38% (from 1 January 2026) and 8-year deemed disposal.
Advantages
- Very low fees (0.05–0.5%)
- Instant diversification
- Trade like shares
- Exit Tax cut from 41% in 2026
Considerations
- 38% Exit Tax (vs 33% CGT)
- 8-year deemed disposal
- No loss offset relief
- Brokerage fees apply
Irish Property (Direct)
Medium–High RiskIrish residential or commercial property. Combines rental income (4–7% gross yield) with capital growth. Stamp duty: 1% on first EUR 1m, 2% on the balance for residential; 7.5% non-residential; 10% on bulk purchases of 10+ residential units.
Advantages
- Tangible asset
- Rental income stream
- Mortgage leverage available
- Principal residence CGT-exempt
Considerations
- Stamp duty payable
- Rental income at marginal rate (up to ~52%)
- 33% CGT on gains
- RTB regulations apply
Irish REITs
Medium–High RiskEuronext Dublin-listed property companies such as IRES REIT. Access commercial and residential property without buying directly. REIT distributions are subject to 25% Dividend Withholding Tax.
Advantages
- Liquid (trade on Euronext)
- Low entry cost
- Regular distributions
- Subject to 33% CGT (not Exit Tax)
Considerations
- Equity-market volatility
- 25% Dividend Withholding Tax
- Interest-rate sensitive
- Concentrated Irish market
Pension (Growth) / PRSA
Medium–High RiskEquity-focused PRSA, occupational scheme, or auto-enrolment "My Future Fund". Suits younger savers with 20+ year horizons. Tax relief at marginal rate (up to 40%), 25% tax-free retirement lump sum (max EUR 500,000).
Advantages
- Up to 40% tax relief
- Tax-free fund growth
- 25% tax-free lump sum (cap EUR 500K)
- Employer contributions (workplace)
Considerations
- Locked until retirement
- Higher short-term volatility
- SFT cap (EUR 2.2m in 2026)
- Age-related % limits apply
Stock Market (Euronext Dublin)
High RiskDirect share investment on Euronext Dublin or other exchanges. Capital gains taxed at 33% CGT with EUR 1,270 annual exemption. Dividends subject to Dividend Withholding Tax and marginal rate income tax (with credit for DWT).
Advantages
- 33% CGT (not 38% Exit Tax)
- EUR 1,270 annual CGT exemption
- No 8-year deemed disposal
- Loss offset available
Considerations
- High volatility
- Capital can be lost
- Requires research
- Small Irish market
Cryptocurrency
Very High RiskDigital assets such as Bitcoin and Ethereum via MiCA-regulated exchanges. Revenue treats crypto as a chargeable asset for CGT — gains taxed at 33% with EUR 1,270 annual exemption. Each crypto-to-crypto trade is a taxable disposal.
Advantages
- High growth potential
- 24/7 global market
- MiCA-regulated platforms (EU)
- 33% CGT (not 38% Exit Tax)
Considerations
- Extreme volatility
- Can lose 50%+ quickly
- Each trade a taxable event
- Security & scam risks
Frequently Asked Questions
Common questions about compound interest, savings, pensions and tax in Ireland. Answers reference Revenue.ie, the Central Bank of Ireland, the ECB and Citizens Information official guidance.
Simple interest is calculated only on the original principal amount. Compound interest is calculated on the principal plus any accumulated interest.
Example: EUR 10,000 at 5% for 5 years. Simple interest = EUR 12,500 (gain of EUR 2,500). Compound interest (monthly) ≈ EUR 12,834 (gain of EUR 2,834). The EUR 334 difference comes from earning interest on previously earned interest.
Citizens Information — Savings & InvestmentsThe Rule of 72 is a quick way to estimate how long it takes to double an investment. Divide 72 by the annual return: 72 ÷ rate = years to double.
Examples: at 6% return, money doubles every ~12 years. At 8%, every ~9 years. At 4%, every ~18 years. The rule assumes constant returns and is most accurate for rates between 4–10%.
CCPC — Savings & InvestmentsMore frequent compounding leads to slightly higher returns, because interest is added to the balance more often. The difference is largest at higher rates and over longer periods.
For EUR 10,000 at 6% over 10 years (no contributions):
- Annual compounding: EUR 17,908
- Monthly compounding: EUR 18,194
- Daily compounding: EUR 18,221
Banks must disclose interest rates as an Annual Equivalent Rate (AER) so accounts with different compounding frequencies can be compared on a like-for-like basis.
CCPC — Savings InformationYes. On credit cards, overdrafts and many loans, compound interest works in reverse — interest is charged on previously charged interest, so balances grow if not repaid.
A 15% APR credit card balance left unpaid roughly doubles every 4.8 years (Rule of 72). Repayments above the minimum, especially early in the loan term, reduce the total interest paid.
CCPC — Credit CardsReal return is the return after subtracting inflation — it shows the change in purchasing power rather than the nominal change in euros.
If a savings account earns 4% interest while inflation is 3%, the nominal return is 4% but the real return is approximately 1%. If interest is 2% and inflation is 4%, the real return is roughly -2% — money is losing purchasing power. The European Central Bank targets 2% inflation over the medium term.
ECB — Monetary Policy & InflationDeposit Interest Retention Tax (DIRT) is charged at 33% on interest from Irish bank accounts, credit union shares, and An Post deposits. Banks and credit unions deduct DIRT automatically before paying interest.
If you earn EUR 100 in interest, you receive EUR 67 — the deposit-taker sends EUR 33 directly to Revenue. DIRT is a final liability tax for most savers, meaning no further income tax or USC applies. You must still declare the interest on your annual tax return.
Revenue.ie — Deposit Interest Retention TaxYes, if you (or your spouse/civil partner) are aged 65 or over AND your total household income is below the relevant exemption limit:
- EUR 18,000 for a single, widowed, or surviving civil partner
- EUR 36,000 for a married couple or civil partners (only one needs to be 65+)
You may also qualify if you are permanently incapacitated. Complete a declaration form (Form DE1 or DE2) with each financial institution to receive interest gross. The limits can be increased if you have dependent children.
Citizens Information — DIRT ExemptionThe Irish Deposit Guarantee Scheme (DGS) protects eligible deposits up to EUR 100,000 per person, per institution if a bank, building society, or credit union authorised by the Central Bank of Ireland fails. The DGS is administered by the Central Bank and funded by the credit institutions covered.
For joint accounts, each holder is protected separately up to EUR 100,000. Compensation is paid within 7 working days. The DGS covers branches of credit institutions authorised in Ireland — residency or citizenship is not a factor.
Deposit Guarantee SchemeYes. All State Savings products from An Post are entirely DIRT-free and tax-free:
- Prize Bonds — no fixed interest; chance of monthly tax-free prizes
- Savings Bonds — fixed-term tax-free bond (3 years)
- Savings Certificates — fixed-term tax-free product (5 years)
- National Solidarity Bond — long-term tax-free product (5 or 10 years)
- Instalment Savings — monthly savings plan, tax-free after 5 years
State Savings are backed by the Irish Government via the National Treasury Management Agency (NTMA), so default risk is very low. Investment limits apply to each product.
State Savings — An Post / NTMACredit unions pay dividends on shares rather than interest on deposits, but the effect is similar. Credit union dividends are subject to DIRT at 33%, deducted automatically.
Credit union members benefit from the Deposit Guarantee Scheme, with protection up to EUR 100,000 per person. Many credit unions also offer regular saver accounts and term-deposit products with bonus dividends. Loans from credit unions typically have lower interest rates than mainstream banks.
Citizens Information — Credit UnionsPersonal pension contributions receive tax relief at the marginal income tax rate — up to 40% for higher-rate earners. Relief is subject to two limits:
- Annual earnings cap of EUR 115,000: contributions above this earnings level do not attract relief.
- Age-related percentage limits on contributions:
- Under 30: 15% of earnings
- 30–39: 20%
- 40–49: 25%
- 50–54: 30%
- 55–59: 35%
- 60+: 40%
USC and PRSI are NOT relieved on pension contributions — only income tax. Employer contributions to PRSAs are also tax-deductible up to 100% of salary (no age limits).
Revenue.ie — Pensions Tax ReliefMy Future Fund is Ireland's new auto-enrolment retirement savings scheme, launched on 1 January 2026. It applies to employees aged 23–60 earning over EUR 20,000 per year who are not already in a qualifying pension scheme.
Contribution rates are phased in over 10 years:
- Years 1–3: 1.5% employee + 1.5% employer + 0.5% State top-up
- Years 4–6: 3% + 3% + 1%
- Years 7–9: 4.5% + 4.5% + 1.5%
- Year 10+: 6% + 6% + 2% (total 14% of gross earnings)
Employer and State contributions apply only on earnings up to EUR 80,000. Employees can opt out only after the initial 6 months of enrolment, with automatic re-enrolment every 2 years. Note: My Future Fund contributions do not receive the same income tax relief as private pension contributions, because the State top-up replaces it.
gov.ie — My Future Fund (Auto-Enrolment)The Standard Fund Threshold (SFT) is the maximum capital value of pension benefits an individual can build up tax-efficiently across all schemes. Amounts above the SFT are subject to a Chargeable Excess Tax of 40%.
The SFT is rising from EUR 2.0 million in 2025 by EUR 200,000 each year:
- 2026: EUR 2.2 million
- 2027: EUR 2.4 million
- 2028: EUR 2.6 million
- 2029: EUR 2.8 million (then frozen)
A higher Personal Fund Threshold (PFT) may apply for those with prior protection. The SFT applies to defined contribution and defined benefit pensions combined.
Revenue.ie — Standard Fund ThresholdThe maximum State Pension (Contributory) rate from 1 January 2026 is EUR 299.30 per week (up EUR 10 from EUR 289.30 in 2025) for those aged 66+. This requires 2,080 full-rate PRSI contributions (40 years x 52 weeks) for the maximum rate.
The State pension age is 66, but since 1 January 2024 those born after 1 January 1958 can defer claiming until any age between 66 and 70 to receive a higher weekly rate. The State Pension is not means-tested, but is liable to income tax at the marginal rate.
Citizens Information — State Pension ContributoryYou can take a retirement lump sum of up to 25% of your pension fund. The lump-sum rules are:
- The first EUR 200,000 is entirely tax-free.
- The next EUR 300,000 (i.e. EUR 200,001–EUR 500,000) is taxed at the standard rate of 20%.
- Any retirement lump sum above EUR 500,000 is taxed at the marginal rate (up to 40%) plus USC.
The EUR 500,000 cap is a lifetime limit across all pensions. The Normal Retirement Age varies by scheme but is typically 60–70.
Revenue.ie — Retirement Lump SumsCapital Gains Tax (CGT) is charged at 33% on most chargeable gains in Ireland. Each individual has a EUR 1,270 annual personal exemption (which cannot be transferred between spouses or carried forward).
CGT applies to gains on shares (Irish and foreign), Euronext Dublin shares, gold, cryptocurrency, and property (excluding the principal private residence). Losses can be carried forward indefinitely against future gains. CGT applies to disposals — gifts, sales, and even crypto-to-crypto trades count as taxable events.
Revenue.ie — Capital Gains Tax RatesExit Tax applies to gains on Irish-domiciled investment funds, equivalent EU/EEA/OECD funds, and most ETFs. The rate is 38% from 1 January 2026 — reduced from 41% in Budget 2026 (Investment Undertaking Tax, Life Assurance Exit Tax and equivalent offshore fund tax all reduced).
Key features that differ from CGT:
- No annual exemption (unlike CGT's EUR 1,270)
- 8-year deemed disposal: gains are taxed every 8 years even if not sold
- Losses on funds cannot be offset against other gains
- The 38% rate is higher than the 33% CGT rate
Direct shares and Euronext Dublin REITs fall under CGT (33%), not Exit Tax.
Revenue.ie — Investment Undertaking TaxIf your non-PAYE income (including interest, rent and investment income) exceeds EUR 5,000 in a tax year, you may be liable for 4.2% PRSI on your deposit interest. PRSI was raised from 4.1% to 4.2% on 1 October 2025, with further phased increases scheduled to 2028.
PRSI must be self-assessed and declared on Form 11 — banks and credit unions do not deduct it automatically (unlike DIRT). The Universal Social Charge (USC) does NOT apply to deposit interest, regardless of source.
gov.ie — PRSIInterest from a bank account in another EU Member State is taxed at the standard DIRT rate of 33% and must be declared on your Irish tax return under "Foreign Income".
Interest from non-EU countries (including the UK, US, and other non-EU/EEA jurisdictions) is taxed at the higher of:
- 33% (the DIRT rate); or
- Your marginal income tax rate — 40% for higher-rate earners (above EUR 44,000 in 2026).
Late filing automatically triggers the 40% rate. Ireland's Automatic Exchange of Information agreements mean Revenue receives data from many overseas banks. Foreign interest must be declared on Form 11 (self-assessed) or Form 12 (PAYE).
Revenue.ie — Foreign Deposit IncomeInflation reduces the real value of money over time. The European Central Bank targets 2% inflation over the medium term. Eurozone inflation can rise with energy and other price pressures.
If a savings account earns 3% nominal and inflation is 4%, real return is approximately -1% — meaning purchasing power has fallen even though the euro balance has grown. Over 20 years at 3% average inflation, EUR 100 today has the equivalent purchasing power of around EUR 55. Investments that have historically outpaced inflation include diversified equities, certain types of property, and inflation-linked bonds — though all carry investment risk.
ECB — Monetary Policy & InflationIE ROI Calculator
Calculate return on investment and annualised growth in EUR.
Open calculator →IE Pension Calculator
Project pension value at retirement using Revenue rules.
Open calculator →IE Inflation Calculator
Calculate how the value of EUR changes over time using official inflation data.
Open calculator →IE Income Tax Calculator
Estimate income tax payable using Revenue 2026 tax brackets.
Open calculator →IE Mortgage Calculator
Estimate monthly mortgage repayments and total interest based on ECB rate ranges.
Open calculator →IE Car Loan Calculator
Estimate car loan repayments and total interest in EUR.
Open calculator →Important Disclaimer
For educational and informational purposes only. This calculator produces estimates based on the inputs provided and assumes a constant compounding rate over the projection period. Figures referenced reflect 2026: DIRT 33% on Irish/EU bank, credit union and An Post deposit interest; Capital Gains Tax 33% with EUR 1,270 annual personal exemption; Exit Tax on Irish-domiciled funds and equivalent EU/EEA/OECD ETFs 38% from 1 January 2026 (reduced from 41% in Budget 2026); pension tax relief at the marginal rate (up to 40%) capped against an annual earnings limit of EUR 115,000 with age-related percentage limits; the Standard Fund Threshold is EUR 2.2 million in 2026, rising by EUR 200,000 per year to EUR 2.8 million by 2029; the tax-free retirement lump sum is capped at EUR 500,000 lifetime; State Pension (Contributory) maximum personal rate EUR 299.30 per week from 1 January 2026; auto-enrolment scheme "My Future Fund" launched 1 January 2026 for ages 23–60 earning over EUR 20,000; ECB deposit facility rate 2.50% (effective 16 September 2026). Past investment performance is not a reliable indicator of future returns.
No warranty of accuracy. While Money Snap takes reasonable care to source figures from official authorities (Revenue.ie, the Central Bank of Ireland, the European Central Bank, the Pensions Authority, Citizens Information), this calculator is provided "as is" without any express or implied warranty as to accuracy, completeness, timeliness, or fitness for any particular purpose. Tax rates, contribution limits, policy rates, and pension rules change frequently — figures shown may be out of date following Budget announcements, Finance Bill enactments, ECB Governing Council decisions, or Revenue updates. Individual circumstances including tax residency, domicile status, marital status, scheme rules, and other reliefs claimed may materially affect actual outcomes.
Not financial advice. Information provided is general in nature only and does not take into account your personal circumstances, financial situation, or objectives. Results do not constitute financial, investment, tax, or pension advice and use of this calculator does not create an advisory relationship. Before acting on any figure shown, obtain personal advice from a Central Bank–authorised financial adviser (verify authorisation via the Central Bank Registers) or a Chartered Tax Adviser. Tax queries can be addressed directly to Revenue. Free general information is available from Citizens Information.
Limitation of liability. To the maximum extent permitted by law, Money Snap accepts no liability for any loss, damage, cost, or expense — direct or indirect — arising from reliance on this calculator or the information it produces. Investment products (shares, ETFs, multi-asset funds, REITs, cryptocurrency, life assurance investment policies) carry capital risk and may fall as well as rise in value; the Deposit Guarantee Scheme does not cover investment losses or non-deposit products. The Irish Deposit Guarantee Scheme protects eligible deposits up to EUR 100,000 per person, per institution (administered by the Central Bank of Ireland) at banks, building societies, and credit unions authorised in Ireland; compensation is paid within 7 working days of a determination of unavailability. Investment funds and ETFs are subject to Exit Tax at 38% and the 8-year deemed disposal rule, with no loss-offset relief. Users are responsible for verifying all figures with the relevant authority before relying on them. Use of this calculator is subject to our Terms of Use.