Self-Employment Tax Ireland 2026 — Form 11, Preliminary Tax & PRSI Class S

Irish self-employed face annual Form 11 tax returns, preliminary tax payments, and PRSI Class S contributions. Missing deadlines incurs penalties. This guide covers timelines, calculations, and strategies to minimize your tax burden.

Correction (2026-07-31) — this page previously sent you to the wrong Revenue service. It said the Form 11 is filed "online via myAccount", that preliminary tax is paid "by email/online to Revenue", and that Class S PRSI is paid monthly by the 14th. All three were wrong:

• Form 11 is filed through ROS (Revenue Online Service), not myAccount. myAccount is the PAYE service and does not offer the Form 11 at all — if you went looking for it there and could not find it, that is why.
• You cannot file or pay by email. Revenue does not accept returns or payments by email.
• Class S PRSI is not a monthly payment. It is paid once a year, with your income tax, as part of the same self-assessment. Revenue collects it, pays it into the Social Insurance Fund and sends the contribution record to the Department of Social Protection — which is the department that credits your state pension, not Revenue.

If you set up a monthly PRSI standing order, or missed the pay-and-file deadline because you were waiting for a Form 11 to appear in myAccount, contact Revenue: interest runs from the due date, and a late return also carries a surcharge on the tax.

Key Self-Employment Tax Deadlines (2026)

What actually happens if you are late.

Correction, 31 July 2026. This page previously gave the late-Form-11 penalty as "€100–€500 per day". There is no daily penalty for a late income tax return. The charge is a percentage surcharge on the tax, and it is capped. The old figure would have implied a €36,500 penalty for a return one year late; the true maximum for the 5% band is €12,695.

• Late Form 11 — surcharge on the tax, not a daily fine:
  • filed within two months of the deadline: 5% of the tax due, capped at €12,695
  • filed more than two months late: 10% of the tax due, capped at €63,485
  • The surcharge is on the tax for the year, so it is charged even if you have already paid the tax — being late with the return is what triggers it
• Late or short preliminary tax: no surcharge, but interest runs on the underpayment from the due date
• Unpaid tax: interest at the statutory daily rate for income tax, compounded — check the current rate on revenue.ie, as it is set by statute and has changed

Form 11: The Annual Tax Return

What it includes:

1. Trade income (receipts minus allowable expenses)
2. Other income (rental, interest, dividends)
3. Deductions and reliefs (pension, mortgage interest if applicable)
4. Tax calculation (self-assessment, you calculate tax owed)

Worked Example: Small Business, €60,000 Revenue

Income calculation:

Tax calculation (2026 rates, single, no other income):

Correction, 31 July 2026. The version of this example previously published here gave €5,096, a 26% effective rate. It omitted tax credits entirely and applied a flat 2% USC to the whole profit. Both are wrong, and the first is not a rounding matter: at this profit the tax credits wipe out the income tax completely. The real total is about one fifth of what this page said.

Income tax:

• 20% on €19,600 (well inside the €44,000 standard rate band) = €3,920
• less Personal Tax Credit €2,000 and Earned Income Tax Credit €2,000 = −€4,000
• Income tax due: €0. Credits are non-refundable, so the €80 of unused credit is simply lost

USC (income above the €13,000 exemption limit, so charged on the whole amount, in bands):

• 0.5% × €12,012 = €60.06
• 2% × €7,588 (the balance, within the 2% band which runs to €28,700 in 2026) = €151.76
• USC: €211.82

PRSI Class S: 4.2% × €19,600 = €823.20 (above the €650 annual minimum, so the percentage applies)

Total: €0 + €211.82 + €823.20 = €1,035.02 — a 5.3% effective rate on profit.

Note how the burden is composed: at this income it is almost entirely PRSI, not tax. That matters, because PRSI buys pension entitlement — it is the one item here you would not want to avoid.

PRSI Class S: Self-Employed Contributions

Rate for 2026, and it changes mid-year: 4.2% of net self-employed income (trading profit) to 30 September 2026, then 4.35% from 1 October 2026. The rate has stepped up every 1 October since 2024 under a legislated path, so a single annual figure is always wrong for part of the year.

Minimum contribution: €650 a year. This flat minimum applies whenever the percentage would produce less — in practice below about €15,500 of profit. Below the low annual income threshold you are outside Class S altogether, and you would then need to become a voluntary contributor to keep the year on your pension record. The €500 figure previously given here was the pre-2024 minimum.

Payment: once a year, with the Form 11. Class S is assessed and paid as part of your income tax self-assessment through ROS — there is no separate monthly PRSI bill for the self-employed, and no PRSI payment facility in myAccount.

Who ends up with it: Revenue collects Class S and pays it into the Social Insurance Fund, then sends the record of contributions to the Department of Social Protection. If a year is missing from your contribution record, that is a DSP matter, not a Revenue one — but the fix usually starts with the Revenue return for that year.

What PRSI covers:

• State pension contribution (qualifies you for the State Pension (Contributory), claimed from the Department of Social Protection, not from Revenue)
• Other social insurance benefits, on the terms attaching to Class S — Class S does not carry every benefit that Class A does, so check the current Class S benefit list with the DSP rather than assuming full cover
• Does NOT cover employer benefits like sick pay

Preliminary Tax: Get It Right

Preliminary tax (PT): Estimate of tax you'll owe for current year, due Oct 31

Calculation (2026 PT, based on 2025 income):

Carrying on the example above, where 2025 profit was €19,600 and the 2025 liability worked out at €1,035.02:

• 90% method (the safe harbour): 90% × €1,035.02 = €931.52
• 100%-of-prior-year method: €1,035.02 — also acceptable and simpler, and it removes the risk of under-estimating
• Current-year method: if you project 2026 profit at €20,000, the liability is €0 income tax + €219.82 USC + €840.00 PRSI = €1,059.82, so 100% of that

The three methods give €931.52, €1,035.02 and €1,059.82 for the same taxpayer — pick one, and note that the 90% figure is 90% of the current year's liability, while the 100% option is measured on the prior year, which is why the prior-year route is the one people use when income is rising.

The three statutory options, stated correctly:

1. 90% of the tax for the current year — the year the preliminary tax is for. This is an estimate, so it carries estimation risk
2. 100% of the tax for the immediately previous year — a known number, no estimation risk. This is the option most people actually use
3. 105% of the tax for the pre-preceding year — only available where you pay by direct debit, and not available where the pre-preceding year's liability was nil

Meeting any one of the three protects you from interest. The commonly repeated "90% of prior year's tax" is a conflation of options 1 and 2 and matches neither.

Example, on the figures above:

• 2025 liability: €1,035.02
• Option 2 — pay €1,035.02 by 31 October 2026 as preliminary tax for 2026. Safe regardless of what 2026 turns out to be
• After filing the 2026 return, pay or reclaim the difference against the actual 2026 liability

Allowable Business Expenses

Deductible expenses (reduce taxable profit):

NOT deductible:

• Personal expenses (meals not with client, personal transport)
• Capital purchases >€500 (use capital allowances instead)
• Loan principal (interest is deductible)
• Drawings (your salary—not an expense)
• Gifts to customers (not an allowable business expense)

Capital Allowances: Equipment Depreciation

How it works:

• Buy computer for €1,000 (can't deduct in year 1)
• Instead, claim capital allowance (depreciation) over time
• Industrial Building Allowance (IBA): 4% per year
• General Plant & Machinery: 12.5% per year (straight line)

Example (laptop €1,200, plant rate 12.5%):

• Year 1 allowance: €150
• Year 2 allowance: €150
• ... continues 8 years total

Effect: Deduction spread over asset life (matches wear-out with tax relief).

Self-Employed Tax Planning Tips

Tip 1: Maximize Pension Contributions

• Contribute to PRSA up to age-based limit (15–40% of income)
• Gets tax relief (20–40%)
• Reduces taxable profit
• Example: €10,000 PRSA at 20% relief = €2,000 tax saving

Tip 2: Use Spouse Deductions

If married:

• Can claim spouse as dependent (sometimes)
• Spouse can have independent business (split income)
• Both have separate tax allowances/rates

Tip 3: Timing of Income/Expenses

• Invoice clients in Dec (get paid Jan) → Dec income, Jan cash (timing mismatch)
• Pay year-end expenses (software renewal) before Dec 31
• Caveat: Must follow cash-basis or accruals accounting consistently

Tip 4: Quarterly Tax Estimates

• Don't wait until Oct 31 to estimate tax
• Estimate quarterly (Jan, Apr, Jul, Oct)
• Adjust preliminary tax mid-year if needed
• Reduces year-end cash shock

Common Mistakes

1. Mixing personal & business expenses: Revenue audits this heavily.

   • Fix: Separate business account; use accounting software

2. Claiming excessive mileage, or claiming at one flat rate. There is no single Irish mileage rate. The civil service motor travel rates (unchanged since 1 September 2022) form a grid of four cumulative annual distance bands by three engine sizes, and the rate changes as your yearly total crosses each band — so the rate that applies to a journey depends on how many kilometres you have already claimed that year:

   Cumulative distance in the year	up to 1200cc	1201–1500cc	1501cc and over
   Band 1: up to 1,500 km	41.80c	43.40c	51.82c
   Band 2: 1,501–5,500 km	72.64c	79.18c	90.63c
   Band 3: 5,501–25,000 km	31.78c	31.79c	39.22c
   Band 4: 25,001 km and over	20.56c	23.85c	25.87c

   The €0.43/km previously quoted on this page as the rate is Band 1 for a 1201–1500cc car — correct for at most your first 1,500 km, and it understates Band 2 by 36 cent a kilometre. Fully electric vehicles use the 1201cc–1500cc column; hybrids use their equivalent engine size.

   • Fix: keep a mileage log with dates and cumulative totals, not just an annual figure — you cannot apply a band without knowing the running total

3. Missing preliminary tax deadline: Triggers penalties.

   • Fix: Calendar reminder; aim for mid-Oct

4. Underestimating profit: Think you'll have losses, but profit appears.

   • Fix: Estimate conservatively; claim refund if over-paid

5. Not keeping receipts: No receipt = expense not deductible.

   • Fix: File receipts by category; use cloud storage

Self-Employed vs. Limited Company

Self-employed (sole trader):

• Simpler accounting
• Income tax at 20% up to €44,000 (single, 2026), 40% above — after tax credits
• USC in bands: 0.5% / 2% / 3% / 8%
• PRSI Class S: 4.2% to 30 September 2026, 4.35% from 1 October, minimum €650/year

Limited company:

• More complexity, and a statutory audit/filing burden with the CRO on top of Revenue
• Corporation tax 12.5% on trading profits — not 21%, which was not an Irish rate. Non-trading ("passive") income is charged at 25%, and a surcharge applies to undistributed investment and professional-services income in close companies, which is what stops a company being used purely to shelter profit
• Director's salary subject to income tax, USC and PRSI in the normal way
• Dividends are taxed in the shareholder's hands at their marginal rate plus USC and PRSI — the flat 33% previously stated here is the Capital Gains Tax rate, not the dividend rate

Verdict: the 12.5% headline only helps profit you genuinely leave in the company to reinvest. If you draw everything out, you pay broadly the same personal tax either way and add the company's compliance cost on top. Get this modelled on your own numbers rather than on an income threshold.

Bottom Line

• Form 11 deadline: Oct 31 annually, extended if you both pay and file through ROS
• Preliminary tax: 90% of the current year, or 100% of the prior year (the safer route), due Oct 31
• PRSI Class S: 4.2% on net profit to 30 September 2026 (4.35% from 1 October), minimum €650/year, paid annually with the Form 11 — never monthly
• Total effective tax: highly dependent on profit. At €19,600 it is about 5% once tax credits are applied; it rises steeply once profit passes the point where the €4,000 of credits is used up and again above the €44,000 standard rate band
• Key dates: Oct 31 (PT + balancing payment), Dec 31 (year-end accounts), Oct 31 next year (Form 11)
• Deductions: Maximize business expenses, use capital allowances, contribute to PRSA

Next step: Use the Self-Employment Tax calculator with your estimated annual revenue and expenses. Model preliminary tax payments throughout the year, Form 11 filing, and PRSI contributions. Track deductible expenses in accounting software (Wave, Xero, FreshBooks) to simplify October tax filing.