What Is the Real Net Yield of an HMO After All Costs?

April 28, 2026

Gross yield is one of the most commonly quoted figures in property investment. It is also one of the most misunderstood.

In the HMO market, investors will often see deals promoted with gross yields of 7%, 8%, 9%, or even 10%+. At first glance, those numbers can look attractive. They suggest strong rental income, healthy demand, and a better return than a standard single-let property.

But gross yield is not the money that lands in your pocket.

The real figure investors need to understand is net yield after all costs. That means after utilities, management, voids, maintenance, licensing, insurance, cleaning, compliance, and mortgage costs have been accounted for.

For many HMO investments, the difference between gross and net yield can easily be 3% to 5%, sometimes more, depending on the property, location, borrowing costs, management structure, and how honestly the numbers have been prepared.

At Foot Forward Property Investments, we have always led with the net for 34 years. That is because investors do not spend gross yield. They do not receive gross yield into their bank account. Any company that promotes deals by leading with the gross yield is doing the investor a disservice, because gross yield will never be the money that actually lands in your pocket.

What Is Gross Yield?

Gross yield is the simplest calculation in property investment.

It is usually calculated as:

Annual rental income ÷ property purchase price x 100

For example, if an HMO generates £36,000 per year in rent and the purchase price is £400,000, the gross yield would be:

£36,000 ÷ £400,000 x 100 = 9% gross yield

On paper, 9% may sound strong. But this figure does not include the real operating costs of running an HMO. It does not tell you what is left after bills, repairs, compliance, management, finance, and other costs have been deducted.

That is why gross yield is only a starting point. It is not a reliable measure of investor return on its own.

What Is Net Yield?

Net yield shows the return after costs have been deducted.

A more realistic calculation is:

Annual rental income minus annual costs ÷ property purchase price x 100

Some investors also calculate net return against the cash they have invested, especially when using mortgage finance. That can be useful, but only once the true operating costs and finance costs are clearly separated.

The important point is this:

Net yield tells you what the investment is actually producing. Gross yield only tells you what the rent looks like before the real world gets involved.

Why HMOs Have Higher Costs Than Standard Buy-to-Lets

HMOs can produce stronger rental income than standard single-let properties, but they also have more moving parts.

A single-let property may have one tenant, one tenancy, one set of bills, and fewer day-to-day management demands. An HMO may have four, five, six, or more tenants, with shared spaces, more wear and tear, more compliance requirements, and often bills included within the rent.

That does not make HMOs a poor investment. Far from it. A well-bought, well-managed HMO can still produce excellent returns.

But the numbers need to be presented honestly.

The Main Costs That Reduce HMO Yield

1. Utilities

Many HMO rooms are let with bills included. This usually means the landlord pays for gas, electricity, water, broadband, and sometimes council tax, depending on the setup and local classification.

These costs can be significant.

Energy prices, tenant usage, insulation standards, heating systems, and property size all affect the final number. A five-bedroom HMO with poor insulation and high energy usage can cost far more to run than a modern, efficient property with good controls.

Utilities are one of the biggest reasons why a headline gross yield can look much stronger than the real net return.

2. Management Fees

HMO management is more involved than standard lettings. There may be more tenant communication, more room turnovers, more inspections, more maintenance coordination, and more compliance monitoring.

Management fees vary, but investors should expect professional HMO management to reduce the net return.

This cost should be included from day one, even if the investor plans to self-manage. Time has a value. A property that only works because the owner is doing unpaid labour is not being measured properly.

3. Voids

A void is any period where a room is empty and not producing rent.

Even strong HMOs can experience voids. Tenants move jobs, relocate, finish studies, change circumstances, or move into their own accommodation. Room-by-room lettings often mean there is more tenant turnover than with a single-let property.

A responsible net yield calculation should allow for voids.

Ignoring voids makes the numbers look better, but it does not make the investment better.

4. Maintenance and Repairs

HMOs usually experience higher wear and tear than standard rentals. Shared kitchens, bathrooms, hallways, locks, appliances, furniture, and communal areas are used heavily.

Maintenance should not be treated as an occasional surprise. It is a normal part of owning an income-producing property.

A proper net yield should allow for ongoing repairs, replacement furniture, appliance servicing, decoration, flooring, plumbing issues, electrical work, and general upkeep.

5. Cleaning

Many HMOs include regular cleaning of communal areas. This helps protect the property, improve tenant satisfaction, and reduce disputes over shared spaces.

Cleaning is a real operating cost. It should be included in the figures, not treated as an afterthought.

6. Licensing and Compliance

HMOs can require mandatory licensing, additional licensing, planning considerations, fire safety measures, amenity standards, inspections, and renewal fees.

Licensing rules can vary by local authority, so investors need to understand the position before purchasing.

Costs may include licence applications, fire doors, emergency lighting, alarms, certificates, inspections, and works required to meet local standards.

A deal that looks strong before compliance can look very different once the property is brought fully in line with HMO requirements.

7. Insurance

HMO insurance is usually more specialist than standard landlord insurance. It may cost more due to the nature of multiple occupancy, shared facilities, and higher perceived risk.

Investors should make sure the insurance quote is suitable for the actual use of the property. A cheap policy that does not properly cover an HMO is not a saving. It is a risk.

8. Mortgage Costs

Mortgage costs are one of the largest factors affecting the true net position.

An HMO may require a specialist lender, depending on the property, number of rooms, planning status, licence position, borrower experience, and valuation approach.

The gross yield does not include mortgage payments. Once finance costs are included, the return can look very different.

This is why investors should always ask:

What is the net yield before mortgage costs?

And then:

What is the actual cashflow after mortgage costs?

Both numbers matter.

Example: How a 9% Gross Yield Can Become a Much Lower Net Yield

Let’s use a simplified example.

Purchase price: £400,000
Annual rent: £36,000
Gross yield: 9%

Now deduct realistic operating costs:

Net operating income before mortgage:

£36,000 – £16,160 = £19,840

Net yield before mortgage:

£19,840 ÷ £400,000 x 100 = 4.96%

So the advertised 9% gross yield has become roughly 5% net yield before mortgage costs.

If mortgage costs are then added, the actual cashflow will reduce further.

This does not automatically mean the investment is bad. It means the investor now has a realistic picture. That is the difference between being sold a headline figure and being shown a proper investment case.

Why the Gap Between Gross and Net Yield Is Often 3% to 5%

The gap exists because HMOs have higher income but also higher running costs.

A 9% gross yield may become 5% to 6% net before mortgage. A 10% gross yield may become 6% to 7% net before mortgage. In some cases, if costs are poorly controlled or finance is expensive, the gap may be even wider.

The exact result depends on:

A proper investment analysis should show these assumptions clearly.

Why Leading With Gross Yield Can Mislead Investors

Gross yield can be useful as a quick comparison tool, but it should never be the headline number used to make an investment decision.

When a company leads with the gross yield, the investor may assume the return is stronger than it really is. That can create unrealistic expectations about income, cashflow, and long-term performance.

This is especially important for newer investors who may not yet know how many costs sit beneath the surface.

A deal promoted as “9% yield” may sound like it pays 9% into the investor’s pocket. In reality, once all costs are included, the investor may be looking at a much lower figure.

That is why leading with the net is more transparent.

It gives the investor a clearer view of what the property is likely to produce after the normal costs of ownership have been allowed for.

The Difference Between Net Yield and Cashflow

Net yield and cashflow are related, but they are not the same.

Net yield usually measures the return after operating costs, often before mortgage costs.

Cashflow shows what is left after all operating costs and finance costs have been paid.

For example:

Annual rent: £36,000
Operating costs: £16,160
Net operating income: £19,840
Mortgage costs: £14,000
Annual cashflow: £5,840

In this example, the property may show a net yield of around 5% before mortgage, but the actual annual cashflow after mortgage is £5,840.

Both figures are useful, but they answer different questions.

Net yield helps compare the quality of the asset. Cashflow helps assess what the investor actually receives after debt costs.

What Investors Should Ask Before Buying an HMO

Before investing in an HMO, investors should ask for more than a headline rent figure.

Useful questions include:

1. What is the gross yield?
2. What is the net yield before mortgage costs?
3. What is the expected cashflow after mortgage costs?
4. Have utilities been included in the figures?
5. What management fee has been assumed?
6. What void allowance has been included?
7. What maintenance allowance has been included?
8. Are cleaning costs included?
9. Has HMO licensing been checked with the local authority?
10. Are insurance costs based on a proper HMO policy?
11. Are compliance costs included?
12. What mortgage rate or finance assumption has been used?
13. Are the numbers based on actual comparable rents or optimistic estimates?
14. What happens if rents are slightly lower or costs are slightly higher?
15. Is there a sensitivity analysis showing best case, expected case, and cautious case?

An investor does not need every property to be perfect. They do need the numbers to be honest.

A More Honest Way to Present HMO Deals

A transparent HMO investment summary should show:

This approach helps investors make informed decisions. It also builds trust, because the weaker parts of the deal are not hidden behind a strong-looking gross yield.

What Is a Good Net Yield for an HMO?

There is no single answer, because the right net yield depends on the investor’s goals, risk tolerance, finance position, location, and strategy.

A lower net yield in a strong location with stable demand, good tenant quality, and long-term capital growth potential may be more attractive than a higher net yield in a weak area with poor tenant demand and high management problems.

Investors should not look at yield in isolation.

A good HMO investment should usually be judged by:

A strong investment is not just one with a high advertised yield. It is one where the numbers remain sensible after proper scrutiny.

Why We Have Always Led With the Net

For 34 years, we have always led with the net because it is the figure that matters most to the investor.

Gross yield can make a deal look attractive, but it does not reflect the cost of operating the property. It does not account for utilities, voids, cleaning, maintenance, licensing, insurance, management, or finance.

Investors deserve to see what is likely to be left after those costs.

That does not mean every number can be guaranteed. Property investment will always involve variables. Rents can change. Costs can rise. Mortgage rates can move. Maintenance can vary from year to year.

But a responsible company should still present the clearest possible picture at the outset.

Leading with the net is not just better analysis. It is better investor care.

The Bottom Line

The real net yield of an HMO is often very different from the gross yield used in marketing.

A property advertised at 8%, 9%, or 10% gross may produce a much lower return once all costs are included. The gap between gross and net can often be 3% to 5%, which can materially change the investment decision.

That is why investors should always look beyond the headline figure.

Gross yield tells you what the rent could look like before costs. Net yield tells you what the investment may actually produce. Cashflow shows what may be left after finance.

The most useful question is not, “What is the gross yield?”

It is:

“What is the realistic net yield after all costs, and what is the expected cashflow after mortgage payments?”

That is the figure investors need before making a decision.