How to Calculate Buy-to-Let Returns in Ireland After Tax (2026)
Calculating true buy-to-let returns in Ireland after tax requires working through four layers: gross rental income, allowable Case V deductions, the three-levy tax stack, and operating costs that Revenue does not recognise as deductions. Estate agent brochures stop at gross yield. The number that matters — the cash actually landing in your account after Revenue, your mortgage, your property manager, your insurer, and your solicitor — is typically 40% to 60% lower than the headline percentage.
Here is the complete calculation framework, using a worked example on a EUR 350,000 two-bedroom apartment generating EUR 24,000 in annual gross rent (6.9% gross yield).
Step 1: Calculate Gross Rental Income
Gross rent is what your tenant pays — before any deductions. In this example: EUR 24,000 per year (EUR 2,000 per month).
RPZ constraint: Under the nationwide 2% RPZ rent cap effective March 2026, annual rent increases are limited to CPI or 2%, whichever is lower. If you set the initial rent correctly at the open market rate, this is an acceptable starting point. If you acquire a property with a sitting tenant whose rent was set below market rate, you inherit that below-market position permanently under the 2% cap.
Setting the initial rent: You are not required to start at a below-market rate. The 2% cap applies to subsequent annual increases only, not the first letting of a property. Set the initial rent at the full open market rate, verified using comparable active listings.
Step 2: Calculate Allowable Case V Deductions
These deductions reduce your taxable rental profit. You pay tax on the net profit, not gross rent.
| Deduction Category | Example Amount | Notes |
|---|---|---|
| Mortgage interest (100%) | EUR 9,800 | Requires valid RTB registration — let it lapse and the deduction is lost entirely |
| Property management fee (10%) | EUR 2,400 | Standard rate for full management service |
| Landlord insurance | EUR 1,200 | Building and liability cover |
| RTB registration fee | EUR 40 | Annual; also the condition for mortgage interest deductibility |
| Accounting fees | EUR 500 | Preparation of rental income tax return |
| Minor repairs and maintenance | EUR 800 | Must be repairs, not capital improvements |
| Advertising (re-letting) | EUR 200 | Allowable; includes platform listing fees |
| Total Allowable Deductions | EUR 14,940 |
Capital allowances (wear and tear): Furniture, white goods, and fixtures cannot be expensed in the year of purchase. They are depreciated at 12.5% per annum straight-line over eight years. A EUR 4,000 furniture fit-out generates EUR 500 per year in capital allowances, not EUR 4,000 in year one.
What is not deductible: Local Property Tax (LPT), principal mortgage repayments, the value of your own labour for repairs, and capital improvement costs (these add to acquisition cost for CGT purposes on disposal).
Taxable rental profit: EUR 24,000 (gross rent) minus EUR 14,940 (allowable deductions) = EUR 9,060 taxable profit
Step 3: Apply the Three-Levy Tax Stack
This is where the Irish system diverges sharply from what many investors expect. Rental profit is not taxed at a flat 40%. It is taxed under three separate levies applied simultaneously.
Assumption: Investor is a single individual earning EUR 80,000 from employment (PAYE). The EUR 9,060 rental profit sits entirely above the standard rate cut-off of EUR 44,000 and above the USC 8% threshold of EUR 70,044.
| Levy | Rate | Amount on EUR 9,060 |
|---|---|---|
| Income Tax (higher rate) | 40% | EUR 3,624 |
| Universal Social Charge (USC — 8% band) | 8% | EUR 725 |
| PRSI (Class K/S, from October 2026) | 4.35% | EUR 394 |
| Total Tax | 52.35% | EUR 4,743 |
Less: RPRIR credit (Residential Premises Rental Income Relief): 20% of qualifying rental profit up to EUR 5,000 = 20% of EUR 5,000 = EUR 1,000 credit against Income Tax only. The credit reduces Income Tax from EUR 3,624 to EUR 2,624.
Net tax liability: EUR 2,624 (Income Tax after RPRIR) + EUR 725 (USC) + EUR 394 (PRSI) = EUR 3,743
RPRIR clawback note: The EUR 1,000 credit is subject to a four-year retention rule. If you sell, cease letting, or change use within four years of first claiming it, Revenue claws back every year's credit in full, plus interest. For investors considering a sale within four years, skipping the RPRIR credit is often the better calculation.
Net profit after tax: EUR 9,060 minus EUR 3,743 = EUR 5,317
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Step 4: Subtract Non-Deductible Operating Costs
Revenue does not recognise these costs against rental income, but they are real cash outflows that reduce your actual return.
| Non-Deductible Cost | Example Amount | Notes |
|---|---|---|
| BTL mortgage principal repayments | EUR 5,200 | Interest already deducted; principal is a capital repayment, not an expense |
| Local Property Tax (LPT) | EUR 650 | Not deductible against rental income |
| Annual safety inspections and compliance | EUR 300 | Smoke alarms, BER cert renewals, MPRN checks |
| Vacancy provision (2 weeks per year) | EUR 924 | Approximation for re-letting gaps between tenancies |
| Total Non-Deductible Costs | EUR 7,074 |
Net cash in your account: EUR 5,317 (after-tax profit) minus EUR 7,074 (non-deductible costs) = EUR -1,757
In this example, the property generates a negative cash flow of EUR 1,757 per year despite a 6.9% gross yield. The investor is paying EUR 1,757 from other income sources to hold the asset.
Step 5: Understand the Equity and Capital Growth Dimension
A negative monthly cash flow is not automatically a disqualifying outcome — it depends on what else the investment is doing. The BTL mortgage principal repayments (EUR 5,200 in this example) are not an expense; they are equity building. At the same time, the property's capital value may be appreciating.
The key question is not "does this generate positive monthly cash flow?" — it is "does the total return (rental income net of costs + equity building + capital appreciation) exceed the next-best alternative use of this capital?"
For a high-income Irish professional comparing BTL to aggressive pension AVC contributions, the pension offers zero income tax, zero CGT, and compounding growth. The BTL offers leverage, tangible ownership, and potential capital appreciation, but at the cost of 52.35% marginal tax and 2% capped revenue growth.
The Ireland Investment Property Guide includes a side-by-side 15-year projection comparing BTL and pension AVC returns on identical capital.
How Regional Markets Change the Calculation
The same calculation produces materially different results across Irish markets. The key differentiators: gross yield, service charges (a Dublin-specific drag), and LPT.
| Market | Average 1-Bed Rent | Gross Yield | Service Charge | Net Yield Estimate |
|---|---|---|---|---|
| Dublin city centre | EUR 2,828/month | 6.8% | EUR 2,500-4,500/yr | 2.0-2.8% |
| Galway | EUR 2,309/month | 7.7% | Nil (house) | 3.0-3.8% |
| Cork | EUR 2,103/month | 7.2% | Low (outside centre) | 2.8-3.5% |
| Limerick | EUR 1,900/month | 8.4% | Nil (house) | 3.5-4.2% |
| Waterford | EUR 1,490/month | 7.0% | Nil (house) | 2.8-3.5% |
Net yield estimates are post-tax, post-management-fee, post-LPT approximations for a typical higher-rate taxpayer. Dublin city centre apartments suffer from service charges of EUR 2,500 to EUR 4,500 per year that directly reduce cash flow — a cost that does not appear in gross yield figures.
A Limerick three-bed house at 8.4% gross yield frequently delivers 32% more net cash flow than a Dublin one-bed apartment at 6.8% gross yield on identical capital, precisely because the Limerick property avoids the service charge drag.
The 10-Year Margin Compression Model
The structural problem with Irish BTL under the 2% RPZ cap is not the yield today — it is the trajectory over time.
Year 1: Gross rent EUR 24,000, operating costs EUR 22,000 (management, mortgage interest, insurance, repairs, LPT). Cash surplus before tax: EUR 2,000.
Year 5 (revenue +2%/yr, costs +4%/yr): Gross rent EUR 26,497, operating costs EUR 26,700. Cash deficit before tax: EUR 203.
Year 10 (same assumptions): Gross rent EUR 29,227, operating costs EUR 32,500. Cash deficit before tax: EUR 3,273.
The 2% RPZ cap means revenue grows at half the rate of inflation. Every year, the gap widens. The only correction mechanism is the market rent reset available at the end of a TMD six-year cycle — which is why purchasing properties with pre-March 2026 tenancies (no TMD cycle, no reset) is a materially worse long-term position than purchasing a vacant property and setting rent at market rate from day one.
Common Calculation Errors
Error 1: Treating 40% as the effective rate. The 52.35% rate (40% + 8% + 4.35%) is the correct marginal rate for higher-rate taxpayers. Using 40% overstates post-tax income by 21%.
Error 2: Not conditioning mortgage interest deductibility on RTB registration. The deduction is only available if the tenancy is registered with the RTB at the time of the return. A missed EUR 40 registration fee costs the full mortgage interest deduction.
Error 3: Assuming rent can be increased to market rate. Under the 2% RPZ cap, you can only increase by 2% per year. There is no mechanism to reset to market rate mid-tenancy except the TMD six-year cycle reset, which only applies to tenancies commenced after March 2026.
Error 4: Ignoring the LPT deductibility exclusion. LPT is a real annual cost (EUR 300 to EUR 1,000+ depending on property band) that cannot be deducted from rental income. It reduces cash flow on a post-tax basis.
Error 5: Including the RPRIR credit without accounting for the four-year clawback risk. The EUR 1,000 annual credit is only valuable if you hold the property for more than four years from the year you first claim it. Modelling it as a guaranteed annual saving without the clawback condition produces an overstated return projection.
Frequently Asked Questions
What is the effective tax rate on rental income in Ireland for a higher-rate taxpayer? 52.35% — comprising 40% Income Tax, 8% USC (on income above EUR 70,044), and 4.35% PRSI from October 2026. If non-PAYE income exceeds EUR 100,000, the 3% USC surcharge applies, pushing the effective rate to 55.35%.
Can I deduct my mortgage payments from rental income in Ireland? You can deduct 100% of the mortgage interest — not principal repayments. The interest deduction is conditional on the tenancy being validly registered with the RTB. Principal repayments are capital — they build equity but are not a deductible expense against rental income.
What is a realistic net yield on Irish buy-to-let after tax? For a higher-rate taxpayer on a property outside Dublin with no service charges, expect 3.0% to 4.2% true net yield after management fees, LPT, maintenance, and the 52.35% tax stack — against a gross yield of 7.5% to 8.5%. Dublin apartments compress further, often to 2.0% to 2.8% net, due to service charges of EUR 2,500 to EUR 4,500 per year.
How does the 2% RPZ rent cap affect my long-term return? It permanently constrains revenue growth to 2% per year (or CPI if lower), while operating costs — insurance, maintenance, variable mortgage interest — rise at market rates. Over a 10-year hold, this creates a widening cash flow gap. The only correction mechanism is the market rent reset available at the end of each six-year TMD cycle for tenancies commenced after March 2026.
Is a negative monthly cash flow acceptable on an Irish buy-to-let? It depends on the capital growth thesis and the equity building rate. A property that costs EUR 150/month in negative cash flow while building EUR 5,000 in equity annually and appreciating at 3% per year may still be a strong total return investment. The question is whether the total return exceeds the next-best alternative use of the capital — for a high-income Irish professional, that alternative is often tax-free pension growth.
The Ireland Investment Property Guide includes the complete gross-to-net calculation waterfall, a worked example for each major Irish market, the RPRIR clawback analysis, a 10-year margin compression model under the 2% RPZ cap, and a side-by-side pension vs BTL comparison — the full framework for calculating whether an Irish buy-to-let investment is viable for your specific salary, target property, and ownership structure.
Download at firsthomestartguide.com/ie/investment-property.
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