Should I include refurbishment costs in yield?

If you’re buying and planning to refurbish, including refurbishment in your purchase cost base can give you a more realistic yield number. If you already own the property, refurbishment is better treated as a separate investment decision rather than retroactively changing historical yield.

Is net yield after tax?

Not usually. Most simple yield tools are before tax because tax depends on your wider circumstances. Treat yield as a pre-tax screening metric.

If yields are low where I want to invest, what are my options?

Options people explore include lowering purchase price expectations, increasing deposit, focusing on properties with lower running costs, or reassessing the strategy (for example balancing yield with other goals). This guide can’t advise what you should do, but it can help you see which lever changes the outcome most.

What is a good rental yield in the UK?

There isn’t a single answer. Yield varies by area, property type, and interest rate environment. A lower yield can still be rational if your strategy is long-term capital growth, but it increases your sensitivity to interest rates and voids.

Should I include capital repayments in net yield?

If you are modelling cashflow, including the full repayment mortgage payment is conservative. If you want a cleaner income return metric, some investors use interest-only cost for screening and treat principal repayment as equity build. The right approach depends on what question you’re answering.

Can I use yield to compare property with other investments?

Yield can help you compare income-like returns, but it is not a full like-for-like comparison because property also has leverage, illiquidity, and idiosyncratic costs. If you do use yield as a comparison, make sure you’re comparing net yield to net-of-cost returns elsewhere, and keep the risk differences in mind.

Should I use market value or purchase price?

Use market value to understand the current performance of an existing property. Use purchase cost (including buying costs) when deciding whether a new purchase makes sense.

Is net yield always better than gross yield?

Net yield is usually more informative because it includes costs. But it is only as good as the cost assumptions you include. If you omit major costs, net yield can still mislead.

What costs should never be forgotten?

At minimum: a repairs or maintenance allowance, insurance, letting or management fees (if relevant), void allowance, and service charges (if the property is leasehold).

Does yield account for capital growth?

No. Yield is about income relative to value. Capital growth is a separate return stream and is much harder to forecast reliably.

How do I compare two buy-to-let mortgages when thinking about yield?

Yield itself doesn’t price mortgages. Use yield for property screening, then model cashflow under each mortgage option (rate + fee + expected time you’ll keep the deal).

What’s the difference between net yield and net cashflow?

Net yield is a ratio (percentage). Net cashflow is a cash number (for example £ per month). You can have a good net yield but poor cashflow if your mortgage payment is large, especially on repayment mortgages.

Rental yield explained (UK): gross vs net yield and what costs to include

What rental yield is (and what it is not)

Rental yield is a percentage that compares rental income to a value base (usually the property value or purchase cost). It’s a useful screening metric, but it is not the same thing as profit.

Two properties can have the same yield and very different outcomes once you include:

borrowing costs
voids
maintenance and compliance costs
one-off purchase costs (like stamp duty and legal fees)

Key terms (quick definitions)

Gross yield vs net yield (simple formulas)

Gross yield

Gross yield is the headline number:

Gross yield (=) (annual rent ÷ property value) × 100

It ignores costs, so it can be a good first filter but a bad decision-maker.

Net yield

Net yield subtracts costs first:

Net yield (=) ((annual rent − annual costs) ÷ property value) × 100

“Annual costs” can mean different things depending on your modelling choice. The important part is consistency: if you’re comparing properties, compare using the same cost categories each time.

Which “property value” should you use?

Different tools let you base yield on:

current market value (good for portfolio health checks), or
purchase cost basis (useful for buy decisions; should include one-off buying costs).

If you ignore buying costs (stamp duty, legal fees, refurbishment), you can accidentally overstate yield.

Yield vs cashflow: why you need both

It’s possible to have:

a “good” gross yield but negative cashflow (high mortgage costs), or
a “mediocre” yield but strong cashflow (low borrowing), or
a lower yield in an area you believe will have stronger long-term demand

Yield is best treated as a screening metric, then validated with a cashflow view.

Practical approach:

Screen using gross yield.
Re-screen using net yield with consistent costs.
Stress-test cashflow at a higher interest rate and with a void allowance.

What costs to include (a practical landlord checklist)

Here’s a practical checklist that matches how many landlord tools structure the inputs (and how landlords actually experience costs).

Costs that affect net yield and cashflow

letting agent / management fees
maintenance and repairs
insurance
ground rent and service charges (where relevant)
licensing / compliance costs (where relevant)
council tax and utilities during voids (if landlord-paid)
safety certificates (gas safety, EICR where applicable)
vacancy/void allowance

Borrowing costs (important, but decide how you include them)

If you have a mortgage, you can include:

the monthly mortgage payment as a cost in your cashflow estimate, and/or
an interest-only equivalent when screening, to stress-test

Be consistent: mixing repayment and interest-only assumptions across properties makes comparisons misleading.

A “landlord cost model” you can reuse

To keep comparisons consistent, try grouping costs into four buckets:

Bucket A: Purchase costs (one-off)

transaction tax (where applicable)
legal fees
valuation/survey
mortgage product fees
refurbishment/setup

These affect your purchase cost base and can reduce yield when included.

Bucket B: Running costs (recurring)

maintenance and repairs
insurance
service charges/ground rent (if any)
letting/management fees

Bucket C: Vacancy risk (recurring, but irregular)

Instead of pretending voids don’t exist, include either:

a percentage vacancy loss, or
an annual “void budget” line

Bucket D: Finance costs

Decide which finance view you want:

interest-only (common for screening), or
repayment payment (conservative for cashflow)

Use the same approach across properties so you’re not comparing apples to oranges.

Worked examples (illustrative)

Example 1: Gross yield

Purchase price / value: £250,000
Monthly rent: £1,250 → annual rent £15,000

Gross yield = £15,000 ÷ £250,000 × 100 = 6.0%

Example 2: Net yield with simple annual costs

Add:

annual costs (maintenance, insurance, fees, void allowance): £4,000

Net yield = (£15,000 − £4,000) ÷ £250,000 × 100 = 4.4%

This is why net yield often looks meaningfully lower than gross yield.

Example 3: Including buying costs changes the base

Suppose the same £250,000 property also has:

£7,500 SDLT
£2,000 legal + searches
£3,500 refurbishment

Purchase cost base = £263,000 (simplified).

Gross yield on purchase cost base = £15,000 ÷ £263,000 × 100 ≈ 5.7% (not 6.0%).

The difference looks small, but across a portfolio it compounds.

Common mistakes landlords make with yield

Using gross yield as if it’s profit
Forgetting buying costs
Ignoring voids
Ignoring service charges for flats
Treating a single year of costs as “typical” (costs are lumpy)

Net yield isn’t the same as ROI (and why that matters)

Yield is a ratio against a value base. ROI (return on investment) is a broader concept that can include:

capital growth
principal repayment (if you use a repayment mortgage)
changes in rent over time
one-off costs like refurb or major works

If you’re using yield to decide “is this a good investment?”, treat it as a first-pass metric, then validate with cashflow and risk checks.

Stress testing: the fastest way to spot fragile deals

Try these stress tests on any shortlisted property:

Interest rate +2%: does net cashflow stay positive?
1 month void per year: does the plan still work?
Maintenance shock: add a one-off cost (for example a boiler replacement) and see if your buffer covers it.

If a deal only works under perfect conditions, it’s fragile.

Comparing two properties fairly (a repeatable template)

When comparing Property A vs Property B, decide up front:

base value (purchase cost vs current value)
cost categories included
void allowance method
finance assumption (interest-only vs repayment)

Then compare on:

Gross yield
Net yield
Net cashflow (monthly)
Stress-tested cashflow

This avoids “changing the rules” to make one property look better.

Expanded landlord cost checklist (for realism)

If you want to be more realistic than a single “annual costs” number, common items include:

letting agent setup fees (if applicable)
inventory/check-in/check-out (where used)
safety certificates and compliance work
maintenance and repairs
replacement of appliances/furnishings (if provided)
insurance
service charges and ground rent (leasehold)
council tax/utilities during voids

You don’t have to model every line item precisely on day one, but you should know what you’re excluding and have a buffer.

What “good yield” questions miss

People often ask “what yield is good?” but the better questions are:

“Does the rent still cover costs if rates rise?”
“How sensitive is this to 1 month of voids?”
“If the boiler fails, does the plan break?”
“What is the plan if the property needs major works?”

If a property only works under perfect conditions, it’s a fragile plan.

Worked example: yield can look fine while cashflow is tight

Consider a £250,000 property renting at £1,250/month (6.0% gross yield).

Now add:

annual costs: £4,000 (insurance, maintenance allowance, fees)
mortgage payment: £950/month (illustrative)

Annual rent: £15,000. Annual mortgage: £11,400. Annual other costs: £4,000.

Net cashflow ≈ £15,000 − £11,400 − £4,000 = −£400/year.

The yield headline didn’t warn you. The cashflow did.

This is why landlords often use yield to shortlist and cashflow to decide.

Purchase-cost-based yield: why SDLT and fees matter

If you are comparing two purchases:

Property A has £10,000 of buying costs
Property B has £20,000 of buying costs

And both rent the same amount, Property B will usually have a lower “purchase-cost-based yield”.

That doesn’t automatically make B worse, but it changes what you need the property to do to compensate (higher rent, lower costs, better long-term outcomes).

A simple “void allowance” method

If you want a simple void allowance:

1 month void per year ≈ 8.3% of annual rent
2 months void per year ≈ 16.7% of annual rent

You can convert that into an annual cost line (for example “void allowance = £1,250”) and include it in net yield or cashflow estimates.

Using yield alongside lender borrowing checks (ICR)

Some landlords screen using yield, then discover they cannot borrow as much as expected because lenders use rent-based stress tests (often using a stress rate and an interest coverage ratio).

Practical connection:

yield helps you understand “income return”
ICR-style tests help you understand “can the rent support the borrowing under lender assumptions?”

If a property has low yield, it may struggle both on cashflow and on borrowing limits. If a property has high yield, it may still fail borrowing if rent is capped by comparables or if the lender’s stress test is conservative.

A simple portfolio sanity check

If you plan to own more than one property, you can use yield as a portfolio health check:

average gross yield across the portfolio
average net yield (using a consistent cost model)
how sensitive portfolio cashflow is to a rate rise

The goal is not to optimise a spreadsheet — it’s to avoid building a portfolio where one rate rise makes the whole plan stressful.

A “minimum viable landlord spreadsheet”

If you want a very simple template (one property), track:

property value / purchase cost base
monthly rent
annual costs (repairs allowance, insurance, fees, service charges)
void allowance
mortgage payment assumption
net cashflow per month

Then add a second column for a +2% interest rate assumption.

If the +2% column becomes meaningfully negative, your deal is rate-sensitive.

Final checklist before you rely on a yield number

Have you included buying costs if you’re using purchase-cost yield?
Have you included a repairs/maintenance allowance?
Have you included a void allowance?
Have you included service charges if the property is leasehold?
Have you stress-tested interest rates?

If you can tick all five, your yield number is far more decision-worthy.

Another worked example: same property, different modelling choices

Suppose:

Property value: £300,000
Rent: £1,400/month → £16,800/year
Annual costs (non-mortgage): £4,500

Gross yield = £16,800 ÷ £300,000 × 100 = 5.6%.

Net yield (excluding mortgage) = (£16,800 − £4,500) ÷ £300,000 × 100 = 4.1%.

If you also include mortgage payments as a “cost” for your cashflow view, the monthly net cashflow could be very different depending on your mortgage. That’s why it helps to keep:

yield (percentage) for screening, and
cashflow (pounds) for decision-making.

Flats vs houses: why service charges can change the whole picture

Leasehold flats can have ongoing service charges (and sometimes ground rent). Those costs can be large enough to:

materially reduce net yield
make cashflow more sensitive to voids
reduce the “buffer” you have for repairs

That doesn’t mean flats are bad investments. It means your modelling needs to include the leasehold cost structure, and you should request the service charge schedule and recent history before relying on a yield estimate.

If the building has major works planned, you may face additional one-off costs. A yield number that ignores major works risk can be overly optimistic, especially if your buffer is small.

How Abodewise can help

Use the Rental yield calculator to estimate gross and net yield using your rent and cost assumptions.
Use the Buy-to-let mortgage calculator to check borrowing and payment implications.

What to do next (a repeatable workflow)

If you want a simple repeatable approach:

Use Rental yield with a consistent set of annual costs.
Use Buy-to-let mortgage to test rent-based borrowing and payment assumptions.
Re-run with a higher interest rate and a void allowance.
Compare properties based on both net yield and stress-tested cashflow, not one metric.