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Rental Entry Threshold Calculator

The rental entry threshold calculator helps you determine the minimum rent you must charge to break even on an investment property — covering the mortgage payment and admin costs after allowing for rental income tax. The calculator also shows the gross annual rental yield and an approximate ROI. Remember that the minimum rent is the break-even point — in practice you should aim higher to account for vacancies, repairs and unexpected costs.

Reviewed byRedakcja Liczbnik
Calculator
PLN
PLN/mies.
PLN/mies.
%
Rental Break-Even ThresholdMinimum rent4,043.72PLN
Monthly costs (excl. tax)
3,700.00 PLN
Rent with vacancy buffer
4,731.15 PLN
Annual rental revenue
48,524.64 PLN
Annual costs (mortgage + admin)
44,400.00 PLN
Annual net profit
0.05 PLN
ROI (return on investment)
0%
Gross rental yield
8.09%

How we calculate the minimum rent

Costs = mortgage + admin fee. Minimum rent = costs / (1 – tax/100). With buffer: minimum rent × 1.17 (2 months' vacancy per year). Annual revenue = rent × 12. ROI = (annual revenue – annual costs – annual tax) / property value × 100. Rental yield = annual revenue / value × 100.

Example: property 600,000 PLN, mortgage 3,200 PLN, admin 500 PLN

Property value 600,000 PLN, monthly mortgage 3,200 PLN, admin fee 500 PLN, rental tax 8.5% (lump-sum rate). Total costs = 3,700 PLN. Minimum rent = 3,700 / (1 – 0.085) ≈ 4,044 PLN. With vacancy buffer: approx. 4,731 PLN/month. Gross rental yield ≈ 8.09%. ROI at minimum rent ≈ 0%.

Frequently asked questions

How do I calculate the minimum rent to break even?

Minimum gross rent = (mortgage + admin fee) / (1 – tax rate). By dividing by (1 – tax), the post-tax rent exactly covers costs. Every zloty above this amount is your net profit.

What rental income tax rate applies in Poland?

Private rental income in Poland can be taxed as a lump-sum from revenues (8.5% up to PLN 100,000 annual revenue, 12.5% above) or under the general scale (12%/32% of income). The 8.5% lump-sum is most commonly chosen as simple and advantageous.

What is the gross rental yield and should it be at least 5%?

Gross rental yield = (annual rent / property value) × 100%. In Poland typical values are 4–7%. A 5% yield is considered the minimum for viability. Compare the net yield (after costs and taxes) with alternative investments such as government bonds (4–6% gross in 2026).

What is a vacancy buffer and how should I account for it?

The vacancy buffer is a rent mark-up for periods when the property is empty. Two months' vacancy per year (about 17%) is a common assumption. The calculator shows the buffered rent as a starting point for negotiating the asking price with prospective tenants.

What costs did the calculator miss that I should include?

The calculator only includes the mortgage and admin fee. In practice add: property insurance (approx. 500–1,000 PLN/year), property tax (a few hundred PLN/year), repairs and maintenance (approx. 0.5–1% of value/year), management fee (if through an agent, 5–10% of rent). Include these to find your true break-even.

Is short-term rental (Airbnb) more profitable?

Short-term rental can generate higher revenue (2–3× higher nightly rates vs. long-term), but involves higher running costs (cleaning, communication), higher off-season vacancy risk and different tax rules. Many cities also have regulations restricting short-term lets.

Indicative result

Results are indicative. Actual rental investment profitability depends on many factors: location, rent negotiation, vacancy risk, renovation costs and tax law changes. Consult a financial advisor before investing.
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