Rental Yield Calculator: How We Calculate

Published by PropMatch.ukon22 April 2026•7 min read

CalculatorsRental YieldBuy-to-Let

Rental Yield Calculator: How We Calculate

Tax year coverage: 2024/25 – 2027/28

Estimates only — not tax, legal, or financial advice. Full disclaimer below.

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What This Calculator Computes

This calculator produces three outputs from property inputs:

• Gross yield — Annual rental income as a percentage of purchase price (before costs or tax)
• Net yield — After-tax rental income as a percentage of purchase price
• Break-even rent — Minimum monthly rent needed to cover operating and financing costs before tax

It models: Income tax (progressive and flat rate), corporation tax with marginal relief, dividend tax, and Section 24 mortgage interest tax credit for individual ownership.

It does not model: Scottish income tax rates, capital gains tax, Private Residence Relief, pension interactions, or multi-entity group reliefs.

For step-by-step usage instructions, see the Rental Yield Calculator Manual. To use the calculator directly, go to the Rental Yield Calculator.

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How We Calculate

Step 1 — Aggregate operational expenses

Sum the eight expense categories, converting each to monthly:

Operational Expenses = Letting Fees + Insurance + Maintenance + Ground Rent + Service Charge + Council Tax + Utilities + Compliance

Step 2 — Calculate gross income and gross yield

Gross Income = Gross Rent + Other Income

Gross Yield % = (Gross Income × 12 / Purchase Price) × 100

Step 3 — Calculate pre-tax net income

The treatment differs by ownership:

• Individual: Pre-Tax Net Income = Gross Income − Operational Expenses Financing costs are not deducted here (Section 24 restriction). Instead, a basic-rate tax credit (20%; 22% from 2027-28 per Budget 2025) is applied in Step 4.
• Company: Pre-Tax Net Income = Gross Income − Operational Expenses − Financing Costs Financing costs are deductible before corporation tax.

Step 4 — Calculate tax (annual)

All tax calculations use annual figures internally.

Individual path (progressive income tax):

1. Taxable rental income = Annual Gross Income − Annual Operational Expenses (financing costs excluded per S24).
2. Income tax uses the marginal method: tax on (other income + rental income) minus tax on (other income alone). This places rental income at the correct marginal rate.
3. Mortgage interest tax credit = min(financing costs × basic rate, taxable rental income, total tax liability). The basic rate is 20% (2024-25 to 2026-27) or 22% (2027-28 onwards per Budget 2025).
4. Total tax = Income tax − Mortgage interest tax credit.

Company path (corporation tax + dividends):

1. Taxable profit = Annual Gross Income − Annual Operational Expenses − Annual Financing Costs.
2. Corporation tax at the applicable rate (19% small profits rate for profits ≤ £50,000; marginal relief between £50,000–£250,000; 25% main rate above £250,000).
3. Amount available for dividends = Taxable profit − Corporation tax.
4. Dividend tax uses progressive rates after the £500 dividend allowance. Tax bands are cumulative — they continue from where other personal income (e.g. director salary) left off.
5. Total tax = Corporation tax + Dividend tax.

Step 5 — Calculate net income and net yield

Net Income (monthly) = (Annual Taxable Profit − Total Tax) / 12

Annual Taxable Profit is the ownership-specific figure from Step 3, annualised: taxable rental income for individuals, or taxable profit for companies.

Net Yield % = (Net Income × 12 / Purchase Price) × 100

Step 6 — Calculate break-even rent

Break-Even Rent (pre-tax) = Operational Expenses + Financing Costs − Other Income

This is the minimum monthly rent needed to cover all pre-tax costs.

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These examples can be reproduced using the calculator with the same inputs.

Worked Examples

Example 1 — Individual ownership (progressive tax)

A basic-rate taxpayer with a single buy-to-let property, tax year 2024–25.

Inputs:

Calculation:

1. Operational expenses = £120 + £35 + £60 + £30 (compliance ÷ 12) = £245/month
2. Gross income = £1,200 + £0 = £1,200/month
3. Gross yield = (£14,400 / £285,000) × 100 = 5.05%
4. Taxable rental income (annual) = £14,400 − £2,940 = £11,460 (financing costs excluded per S24)
5. Income tax (marginal method):
   • Tax on £46,460 total = (£46,460 − £12,570) × 20% = £33,890 × 20% = £6,778
   • Tax on £35,000 other income = (£35,000 − £12,570) × 20% = £22,430 × 20% = £4,486
   • Marginal income tax on rental income = £6,778 − £4,486 = £2,292
6. Mortgage interest tax credit = min(£7,800 × 20%, £11,460, £2,292) = min(£1,560, £11,460, £2,292) = £1,560
7. Total tax = £2,292 − £1,560 = £732/year
8. Net income = (£11,460 − £732) / 12 = £894/month
9. Net yield = (£10,728 / £285,000) × 100 = 3.76%
10. Break-even rent = £245 + £650 − £0 = £895/month

Result: Net yield after tax = 3.76% | Monthly net income = £894

Audit test: RY-METH-001

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Example 2 — Company ownership (corporation tax + dividends)

A company-owned property with profits extracted as dividends, tax year 2024–25. The director has £35,000 salary from other employment.

Inputs:

Calculation:

1. Operational expenses = £180 + £45 + £75 + £25 + £50 + £40 (compliance ÷ 12) = £415/month
2. Gross income = £1,800 + £0 = £1,800/month
3. Gross yield = (£21,600 / £350,000) × 100 = 6.17%
4. Taxable profit (annual) = £21,600 − £4,980 − £7,200 = £9,420 (financing costs deductible for companies)
5. Corporation tax = £9,420 × 19% = £1,789.80 (small profits rate)
6. Amount available for dividends = £9,420 − £1,789.80 = £7,630.20
7. Dividend tax (progressive):
   • Personal allowance (£12,570) fully absorbed by £35,000 salary
   • Taxable dividends = £7,630.20 − £500 allowance = £7,130.20
   • All within basic rate band: £7,130.20 × 8.75% = £623.89
8. Total tax = £1,789.80 + £623.89 = £2,413.69/year
9. Net income = (£9,420 − £2,413.69) / 12 = £583.86/month
10. Net yield = (£7,006.31 / £350,000) × 100 = 2.00%
11. Break-even rent = £415 + £600 − £0 = £1,015/month

Result: Net yield after tax = 2.00% | Monthly net income = £583.86

Audit test: RY-METH-002

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Tax Constants and Rates

All constants are sourced from HMRC guidance and Finance Act 2025, as implemented in the calculator. 2025/26 rates are identical to 2024/25 and are not shown separately.

Income Tax (Individuals)

Corporation Tax

Dividend Tax

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Assumptions and Limitations

Assumptions

Personal allowance is applied to other income first. The calculator assumes your personal allowance (£12,570) is fully consumed by non-property income before rental income is taxed. Impact: may overstate income tax if your other income is below the personal allowance. When this matters: if you have little or no non-property income and your personal allowance would partially or fully apply to rental income, your actual tax will be lower.

Rental income is the only property income stream. The calculator does not model capital gains, trading income, or income from furnished holiday lets. Impact: total tax liability may differ if you have other property-related income. When this matters: investors with diversified property income sources.

All properties are in England or Wales. Scottish income tax rates are not modelled. Impact: results will be incorrect for Scottish taxpayers. When this matters: if you are registered as a Scottish taxpayer with HMRC.

Mortgage interest is treated as the only finance cost. The calculator applies Section 24 treatment (basic-rate tax credit for individuals, full deduction for companies) to the entire financing costs field. Impact: accurate for standard mortgage interest but may differ if you have other types of finance costs with different treatment. When this matters: if your financing costs include non-standard arrangements.

Corporation tax is calculated on a single-company basis. The calculator does not model associated companies, group reliefs, or apportioned thresholds. Impact: may understate corporation tax if your company has associated companies sharing the small profits limit. When this matters: investors with multiple SPVs.

Limitations

The calculator does not cover:

• Capital gains tax on property disposal
• Private Residence Relief, EIS relief, or other investment reliefs
• Scottish or Welsh income tax rate variations
• Pension interactions or salary sacrifice effects
• Void periods or tenant default risk
• Property revaluation or capital growth projections
• Stamp duty on the initial purchase
• Professional fees (accountancy, legal) beyond the modelled categories

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When to Get Professional Advice

This calculator provides a starting point for understanding your rental yield after tax. A qualified tax adviser can factor in reliefs, allowances, planning strategies, and interaction effects that a general-purpose tool cannot model — including capital gains planning, incorporation decisions, and multi-entity structuring. Consult an adviser before making financial decisions based on these estimates.

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FAQ

Does this calculator account for mortgage interest?

For individual ownership, mortgage interest is not deductible from rental income — Section 24 restricts relief to a basic-rate tax credit (20%; 22% from 2027-28 per Budget 2025). The calculator applies this restriction automatically. For company ownership, mortgage interest is deducted as an expense before corporation tax is calculated. See the Tax Calculations Guide for a detailed breakdown of S24.

Why is my net yield lower than expected?

Net yield accounts for all operating costs, financing costs, and tax. The most common reasons for a lower-than-expected result are: (1) income tax at the marginal rate pushing rental income into a higher band, (2) limited mortgage interest relief under Section 24, and (3) operational expenses that are higher than estimated. Use the calculator to test sensitivities by adjusting individual inputs.

How does the calculator handle multiple tax years?

Use the Tax Year dropdown to select 2024–25, 2026–27, or 2027–28. The calculator applies the correct rates for each year — including the +2 percentage point income tax increase from 2027–28 and the dividend tax rate changes from 2026–27. The constants table in this methodology page lists the exact rates for each year.

Can I compare individual vs company ownership?

Yes. Change the tax treatment selector between "Personal" and "Limited Company" (with or without dividends) while keeping all other inputs the same. The net yield will reflect the different tax treatment of financing costs and the applicable tax rates for each structure. Worked examples 1 and 2 above demonstrate the same property under both ownership models.

What is the break-even rent figure?

Break-even rent is the minimum monthly rent needed to cover all operating and financing costs before tax. If your actual rent is below this figure, the property generates a pre-tax loss. This figure is the same regardless of ownership structure because it is calculated before tax. It does not include tax, so a property above break-even can still produce a low or negative net yield if tax is high.

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Disclaimer

This calculator provides estimates based on the methodology described above. It is not tax, legal, or financial advice. Tax legislation changes regularly. Rates and thresholds were correct as at 22 April 2026 but may have changed. Always verify with HMRC or a qualified adviser. PropMatch.uk accepts no liability for decisions based on calculator outputs.

Further Reading

• Budget 2025 Wizard Manual
• Compare Tax Years Calculator
• Compare Tax Years Calculator: How We Calculate