Airbnb Investment Calculator UK — ROI, Yield and Monthly Returns
Last updated: April 2026
This UK Airbnb investment calculator shows the ROI, gross yield, net yield, and monthly cash flow on a property purchase for short-term letting — so you can see whether the numbers stack up before committing.
It's designed for buyers who have already found a property and want to validate the investment case with honest figures — not for buyers who want to be told the numbers work.
If you haven't yet estimated what the property would earn, use the income calculator first — then enter that net income figure here.
The most important output is not gross yield — it is monthly cash flow after the mortgage payment, which determines whether the investment is sustainable in a slower month.
An Airbnb investment calculator models whether a UK property purchase makes financial sense for short-term letting — by combining expected monthly net income with purchase price, deposit, mortgage, and running costs to show annual ROI, gross and net yield, and monthly cash flow. Enter your property details below to see whether the numbers stack up before committing to a purchase.
Airbnb investment calculator — ROI, yield and cash flow
Enter your purchase details and expected net income to see the investment return
Illustrative — based on your inputs. Actual income depends on postcode, property type, occupancy, and management quality. Use the income calculator for a postcode-specific net income estimate.
Get a postcode-specific income estimate →Want us to run the investment numbers for a specific property?
Postcode-specific net income estimate — the starting point for any ROI calculation. Takes 2 minutes, no obligation.
The gap between gross yield and what you actually clear each month — why developer figures rarely reflect reality
Gross yield is the figure most commonly used to market UK investment properties for short-term letting.
It is calculated by dividing annual gross booking revenue by the purchase price.
It tells you nothing about whether the investment generates positive cash flow.
Developer projections for holiday let properties often show gross yields of 8–12%.
After mortgage, management fees, and running costs, the actual cash-on-cash return on a typical UK property is 3–8% — and can be negative on overleveraged or poorly located purchases.
The gap between the headline figure and the real return is almost always cleaning, void periods, and the mortgage cost — three things that are routinely omitted from developer-provided cashflow projections.
| Metric | What it measures | Typical range (UK STL) | What it misses |
|---|---|---|---|
| Gross yield | Annual gross revenue ÷ purchase price | 6–12% | Platform fees, management, cleaning, running costs, mortgage |
| Net yield | Annual net income after costs ÷ purchase price | 4–8% | Mortgage — whether the investment is cashflow positive |
| Cash-on-cash return | Annual cash flow after mortgage ÷ deposit | 3–8% | Capital appreciation — the total return picture |
| Monthly cash flow | Net income − mortgage − running costs | £0–£600 typical | The figure that determines whether you can sustain a quiet month |
Monthly cash flow is the metric that matters most for sustainability.
A property generating 8% gross yield but negative monthly cash flow requires the owner to fund the shortfall every month — which becomes critical in quieter periods when STR income falls.
How to tell if the deal makes sense — three tests before you commit to a purchase
Run the calculator three times before deciding whether a property makes sense as an Airbnb investment.
- Test 1 — Can it survive the quiet months? Enter the income figure for January or February — typically 40–55% of the annual average monthly figure. If monthly cash flow turns negative at that income level, the deal requires you to fund the shortfall every slow month. That may be acceptable — but you need to know before committing.
- Test 2 — What does the cash-on-cash return look like vs alternatives? Compare the calculator's cash-on-cash figure against a long-term tenancy on the same property. If the STL cash-on-cash is lower than what a long-let would produce on the same deposit, the investment case depends on capital appreciation alone — a different thesis.
- Test 3 — Does the deal survive a 10% income drop? Reduce the monthly income figure by 10% and recalculate. If cash flow collapses on a small income reduction, the deal is fragile. Robust deals remain cashflow positive with a 10–15% income reduction applied.
Interest-only mortgages are standard for buy-to-let investors because they maximise monthly cash flow.
On a £250,000 property with a 25% deposit and 5.5% interest rate, the monthly interest-only payment is £859.
On a repayment basis over 25 years, the same mortgage costs £1,145 per month — a £286 difference that directly determines whether the investment generates positive or negative cash flow.
Most STL investment calculators should be run on interest-only first to assess the cash flow case, then on repayment to understand the true monthly commitment if the lender requires it.
What the numbers look like for a well-chosen UK short-let property — honest worked example
The following example uses a two-bedroom property in a UK city at conservative occupancy and a 25% deposit.
All figures are illustrative — run the calculator above with your specific property details for an accurate result.
| Input / Output | Conservative scenario | Expected scenario |
|---|---|---|
| Purchase price | £220,000 | £220,000 |
| Deposit (25%) | £55,000 | £55,000 |
| Loan | £165,000 | £165,000 |
| Interest-only mortgage (5.5%) | £756/month | £756/month |
| Monthly net STR income (Stayful) | £1,200 | £1,450 |
| Monthly running costs | £370 | £370 |
| Monthly cash flow | £74 | £324 |
| Annual cash flow | £888 | £3,888 |
| Gross yield | 6.5% | 7.9% |
| Net yield (before mortgage) | 4.5% | 5.9% |
| Cash-on-cash return | 1.6% | 7.1% |
The conservative scenario produces a thin but positive cash flow of £74/month.
In the quietest month, income drops to approximately £540–£660 — producing negative cash flow of around £100–£200, which the owner must fund.
The expected scenario produces £324/month positive cash flow, remaining positive even in a quiet month at 45% occupancy.
Neither scenario produces a high cash-on-cash return — short-let property investment returns most of its value through income uplift over long-let (not yield alone) and through capital appreciation over the hold period.
The 70-day occupancy threshold for maintaining business rates status (rather than council tax) means the property needs genuine, sustained demand throughout the year — not just a strong summer.
The income calculator at /airbnb-income-calculator shows which postcode areas have sufficient year-round demand to sustain the 70-day let threshold comfortably.
Areas where the conservative estimate still shows strong income — such as university cities, major employment centres, and heritage towns — are more suitable for investment than seasonal leisure-only locations where the winter period may not meet the threshold.
Get the income figure for your specific property first
The investment calculation is only as accurate as the income figure you put into it. Stayful's postcode-specific estimate takes 2 minutes and shows net income including quieter months.
The questions UK investors ask when they first see the real ROI figure
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A cash-on-cash return of 5–8% after all costs including mortgage is a strong result for a UK short-let property in 2026.
Most well-chosen properties at current interest rates produce 3–6% cash-on-cash — modest on a cash return basis, but typically significantly better than the same property on a long-term tenancy, and before any capital appreciation is factored in.
Properties showing gross yield above 10% should be stress-tested against realistic occupancy and cost assumptions — the gap between gross yield and actual cash return is usually larger than buyers expect.
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Most buy-to-let investors use interest-only because it maximises monthly cash flow — which is the figure that determines whether the investment is sustainable across quiet months.
On a £165,000 loan at 5.5%, interest-only costs £756/month versus £1,008/month on repayment over 25 years — a £252 difference that can turn a marginally positive investment into a negative one.
Whether interest-only is available depends on the lender and your circumstances. Always confirm with a mortgage broker who specialises in buy-to-let.
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For well-chosen properties in locations with genuine year-round demand, yes — short-let generates materially higher net income than long-let on the same property, which offsets higher running costs and management fees.
For properties in seasonal-only locations, overleveraged at current interest rates, or in areas without consistent demand, the case is much weaker.
The calculator above shows whether your specific property and purchase structure produces positive cash flow. If it doesn't at conservative income assumptions, the investment relies on capital appreciation — which is a different and less predictable thesis.
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Most buy-to-let lenders require a minimum 25% deposit, though some products allow 20%.
Holiday let mortgages — which specifically allow short-term letting — typically require 25% and apply an affordability stress test based on projected rental income rather than personal income.
Standard residential mortgages do not permit short-term letting — using one on a property you intend to Airbnb is a breach of your mortgage terms. Always confirm your mortgage type before proceeding.
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Gross yield: (annual gross STR income ÷ purchase price) × 100.
Net yield: (annual net income after all costs, before mortgage ÷ purchase price) × 100.
Cash-on-cash return: (annual cash flow after mortgage and all costs ÷ deposit amount) × 100.
The calculator above produces all three figures automatically based on your inputs. Net yield and cash-on-cash are the two that matter for investment decisions — gross yield alone is not a reliable indicator of investment performance.
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0113 479 0251Get the income figure — then decide whether the deal works
Postcode-specific net income estimate from 189 verified UK properties. The starting point for any STL investment calculation. No obligation, 2 minutes.
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