Working out jak wyliczyć rentowność mieszkania na wynajem before you make an offer is the single most profitable hour you will ever spend on a property. Investors who skip it buy on instinct and discover the shortfall somewhere around the twelfth mortgage statement. The arithmetic itself is simple, but it demands honest inputs: the real purchase price including every fee, the rent a tenant will actually pay on that street rather than the agent’s optimistic guide, and all recurring costs from service charge to insurance to the void weeks between tenancies. A £150,000 two-bed generating £825 a month looks strong at first glance, yet the same flat can return under 3% once ground rent, management and major works land. This guide covers gross yield, net yield, cash-on-cash return and the financing decisions that quietly move the final number by several percentage points.
Gross yield: the fastest way to filter listings
Anyone learning jak wyliczyć rentowność mieszkania na wynajem starts with gross yield, which is annual rent divided by purchase price and multiplied by one hundred. A flat bought for £150,000 letting at £825 a month produces £9,900 a year, a 6.6% gross yield. The figure ignores every cost, so use it to eliminate weak stock, not to decide.
Use the achievable rent, not the asking rent. Check three comparable properties on the same street that have already let rather than those still advertised, then deduct three to five percent for the discount most tenants negotiate on a twelve-month contract. Optimism at this stage compounds through every later calculation and quietly destroys projected returns.
Purchase price also means total acquisition cost. Add stamp duty, a survey at £400 to £700, conveyancing around £1,200 and, on Polish transactions, the notary tariff. Buyers who research jakie opłaty notarialne przy zakupie mieszkania early avoid a three to four percent surprise that drags a headline 6.6% yield down toward 6.3%.
| Property | Purchase price | Monthly rent | Gross yield | Net yield |
|---|---|---|---|---|
| Studio, city centre | £110,000 | £625 | 6.8% | 4.3% |
| One-bed, suburban | £150,000 | £825 | 6.6% | 4.4% |
| Two-bed, commuter town | £195,000 | £1,050 | 6.5% | 4.6% |
| Three-bed, family area | £260,000 | £1,300 | 6.0% | 4.2% |
Why two flats at the same price yield differently
A studio near a university lets at £625 while a one-bed on the same estate lets at £825, yet the studio costs £40,000 less. Smaller units usually win on gross yield and lose on tenant stability and capital growth, which is exactly why this metric alone never settles a purchase decision.
Net yield: what the flat actually pays you
Net yield subtracts running costs from annual rent before dividing by total acquisition cost. On that £150,000 flat, a service charge of £1,100, ground rent of £250, insurance at £180, management at ten percent of rent and a repairs float of £600 remove roughly £3,120, leaving £6,780 and a net yield near 4.4%.
- Service charge and ground rent: £900 to £2,400 a year on a typical leasehold flat
- Letting agent management: 8 to 12% of rent, plus a tenant-find fee of one week’s rent
- Maintenance and reactive repairs: budget one percent of property value annually
- Landlord insurance and boiler cover: £180 to £350 combined
- Void periods: two to four weeks between tenancies in most regional markets
- Compliance certificates: gas safety, electrical inspection and energy assessment, around £250 a year averaged
Set the repairs figure from the building’s age rather than from hope. A 1970s block with an underfunded reserve will eventually issue a £4,000 major works demand, and spreading that across ten years of ownership is far more honest than assuming the letter never arrives.
Tax sits outside the yield calculation but decides what reaches your account. Model rent as taxable income at your marginal rate, because a 4.4% net yield becomes closer to 2.6% for a higher-rate payer holding the flat personally rather than through a limited company structure.
Financing: how the mortgage rewrites the return
Leverage transforms the arithmetic completely. A 25% wkład własny do kredytu hipotecznego on a £150,000 flat means £37,500 of your own capital against £112,500 borrowed, and the return that matters is measured against that £37,500, not against the full purchase price of the property.
Before modelling anything, establish what a lender will actually advance. Anyone asking zdolność kredytowa jak obliczyć should take gross monthly income, subtract existing commitments and card limits, then stress the payment at a rate two to three points above the one offered, which mirrors underwriting practice.
Rate structure matters as much as the margin. Borrowers weighing kredyt hipoteczny stała czy zmienna stopa are choosing between payment certainty and potential savings, and anyone asking co to jest WIRON w kredycie is really asking how a transaction-based benchmark repriceses their instalment when market conditions shift.
Cash-on-cash return
Cash-on-cash return divides annual pre-tax cash flow by the cash you actually invested. With rent of £9,900, running costs of £3,120 and mortgage interest of £5,600, the flat throws off £1,180 against £43,500 committed, roughly 2.7%. Deciding jak wybrać najlepszy kredyt hipoteczny is therefore a yield decision, not administration.
Due diligence that protects the number
Verify ownership before you commit a deposit. Investors who know jak sprawdzić księgę wieczystą online can confirm the seller’s title, spot a mortgage entry against the property and identify easements within minutes, avoiding the kind of legal delay that quietly costs a full month of rental income.
The reservation stage carries real money. Anyone searching umowa przedwstępna sprzedaży mieszkania wzór should treat that template as a starting point only, then insert a financing condition so a declined application returns the deposit rather than forfeiting a sum equal to five percent of the price.
Timing affects your return through carrying costs. Preparing jakie dokumenty do kredytu hipotecznego in advance, meaning payslips, tax returns, bank statements and the preliminary contract, shortens underwriting considerably. The realistic answer to jak długo trwa decyzja kredytowa is two to six weeks, and every extra week compresses first-year yield.
Stress-testing the return before you commit
Model a bad year, not an average one. Assume six weeks empty, a £900 boiler replacement and an interest rate two points higher, then recalculate. A flat that still covers its costs under that scenario is an investment; one that needs perfect conditions to break even is a bet.
Overpayment changes the profile of the whole portfolio. Landlords researching jak nadpłacać kredyt hipoteczny should compare the guaranteed saving against the yield of an alternative purchase. Paying £500 extra each month against a 6% loan is a risk-free 6% return, which comfortably beats a marginal second flat at 4.4%.
Exit costs deserve identical scrutiny. Before overpaying or refinancing, confirm ile kosztuje wcześniejsza spłata kredytu, because early repayment charges of one to three percent inside a fixed period can erase several years of accumulated savings. Estate agency fees of one to 1.5% and capital gains tax complete the picture.
How do I calculate profitability if the flat sits empty for part of the year?
Build the void directly into the annual rent line rather than treating it as an unpleasant surprise. If market rent is £825 and you expect three empty weeks, annual income becomes £9,900 minus £570, so £9,330. Applying jak wyliczyć rentowność mieszkania na wynajem to that adjusted figure against a £156,000 total acquisition cost produces 5.9% gross instead of 6.6%. Service charge, ground rent, insurance and mortgage interest all continue during a void, so an empty month actually costs closer to £1,000 than £825. Regional two-beds typically show two to four weeks of vacancy per tenancy change, while city-centre studios turn over faster and justify a six-week assumption.
Is a 5% net yield good enough for a buy-to-let flat?
A 5% net yield is respectable for a leasehold flat in a stable regional market, provided the calculation already includes management fees, compliance certificates, a realistic repairs float and void weeks. The test is not the headline percentage but the margin above your borrowing cost. If the mortgage rate sits at 5.5%, a 5% net yield means the property loses money on a monthly basis and relies entirely on capital growth to justify itself. If the rate is 4%, that same 5% produces genuine positive cash flow. Compare it against a cash alternative too: a savings account paying 4.5% carries none of the tenant risk, repair liability or illiquidity.
What costs do investors most often leave out of the calculation?
Four omissions appear repeatedly. Major works on leasehold blocks arrive as a single demand of £3,000 to £8,000 and belong in the annual budget as an amortised figure. Tenant-find fees of one week’s rent apply at every changeover, not once. Furnishing and refresh costs between tenancies, typically £600 to £1,500 for redecoration and white goods, are treated as one-off when they recur every three or four years. Finally, the opportunity cost of the deposit itself is ignored: £37,500 sitting in a property is £37,500 not earning elsewhere, and any serious profitability calculation compares the two side by side.