HMO Return on Investment Calculator
Model the full return picture — not just cash flow, but equity built and capital growth over time.
Purchase & Financing
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Typically 25% for HMO BTL (£68,750 on £275k)
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Stamp duty (5% surcharge), solicitor, survey, fees
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HMO compliance works, fire doors, furniture
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Annual Income & Costs
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After voids (e.g. 5 rooms × £550 × 90% × 12)
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Bills, management, maintenance, licensing, insurance
Growth assumptions
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20% basic, 40% higher, 0% for ltd co modelling
Year 1 cash-on-cash ROI
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Year 1
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total return
Year 3
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total return
Year 5
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total return
Year 10
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total return
Where your 5-year return comes from (base case)
Cumulative cash flow
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Equity built (mortgage)
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Capital appreciation
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| Scenario | 5yr cash flow | 5yr equity | 5yr appreciation | 5yr total return | Annualised ROI |
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How HMO ROI is calculated
Most property calculators show yield or monthly cash flow. ROI goes further — it measures the return on your actual invested capital over a given time horizon, combining three distinct components:
- Cash-on-cash return — annual net cash profit ÷ total cash invested. The purest measure of income return on capital. If you invest £95,000 in total (deposit + costs + refurbishment) and make £7,500/year net, your cash-on-cash ROI is 7.9%.
- Equity built through mortgage repayments — on a repayment mortgage, each monthly payment reduces the outstanding loan. Over five years on a £206,250 mortgage, you might repay £28,000–£35,000 of capital. This is wealth creation through debt reduction, even if the property value doesn't change.
- Capital appreciation — the increase in property value over the holding period. At 3% annual growth on a £275,000 property, value increases by approximately £43,600 over five years. Because you control this through leverage (25% deposit controlling 100% of the asset), the return on your invested capital from appreciation alone is approximately 46%.
Total ROI = cumulative net cash flow + equity built + capital appreciation, expressed as a percentage of total cash invested. The three scenarios (pessimistic/base/optimistic) in the calculator model the appreciation component under different market conditions — the cash flow and equity components are the same in all three.
Frequently asked questions
What is a good ROI for a UK HMO?
A good cash-on-cash ROI for a UK HMO is typically 6–12% per year on capital invested (deposit + all purchase and setup costs). Total ROI including capital appreciation at the long-run UK average of 3% p.a. over a five-year holding period typically adds another 30–50% on invested capital. Well-located HMOs in high-demand university cities like Nottingham, Sheffield, and Glasgow consistently produce cash-on-cash returns that significantly outperform standard single-let properties in the same market.
Should I use interest-only or repayment for an HMO?
Interest-only maximises monthly cash flow — your mortgage payment is lower because you are only paying interest, not repaying capital. Repayment builds equity steadily through each payment and leaves you owning the property outright at the end of the term. For ROI calculation, repayment produces a higher total return because equity built through capital repayment counts as real wealth creation. Many HMO investors use interest-only to maximise current cash flow and plan to repay the principal through a future sale or refinance. Neither is wrong — the right choice depends on your cash flow needs and long-term exit strategy.
How does leverage amplify HMO ROI?
Leverage — using a mortgage to control a larger asset than you could buy outright — dramatically amplifies ROI. If a £275,000 property grows by 3% in a year, it gains £8,250 in value. If you bought it with cash, that is a 3% return. If you bought it with a 25% deposit of £68,750, that same £8,250 gain represents a 12% return on your cash invested from appreciation alone — before counting any rental income. This leverage effect is why property consistently produces higher returns on invested capital than the headline yield figures suggest. It also amplifies losses if values fall, which is why stress-testing assumptions is essential.
What costs should I include in total cash invested?
Total cash invested should include: deposit (typically 25% for HMO BTL), stamp duty (standard rates plus 5% surcharge — use our BTL stamp duty calculator), solicitor and legal fees (£1,500–£2,500), survey (£500–£900), mortgage arrangement fee (£0–£1,999), and refurbishment and HMO compliance works (fire doors, interlinked alarms, HMO-standard furniture — typically £8,000–£25,000 depending on starting condition). Under-counting the total cash invested overstates your ROI significantly.
How is HMO ROI different from HMO yield?
Yield measures the income return as a percentage of property value. ROI measures the total return as a percentage of cash invested. Because of leverage, ROI is typically significantly higher than yield. A 7% net yield HMO purchased with a 25% deposit produces a cash-on-cash ROI of approximately 10–14% once you account for the leveraged return on capital. ROI also includes capital appreciation and equity growth from mortgage repayments — components that yield calculations ignore entirely.
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Disclaimer
ROI projections are illustrative estimates only. Capital appreciation assumptions are speculative and not guaranteed — property values can fall as well as rise. This calculator does not account for all taxes, selling costs, or changes in regulation. Always obtain independent financial and tax advice before making any property investment decision.
About the author
✓ Editorially reviewed — all Poqet guides are checked for factual accuracy before publication and updated when UK rates or legislation change. Editorial Policy