What is a buy-to-let mortgage?

A buy-to-let mortgage is designed for properties you intend to rent out rather than live in. They typically require larger deposits (25%+), have higher interest rates than residential mortgages, and lenders assess affordability based on expected rental income.

What is a good rental yield for buy-to-let?

A gross rental yield of 5-8% is generally considered good for buy-to-let investments. Net yield (after expenses) of 3-5% is typical. Yields vary significantly by location, with northern UK cities often offering higher yields than London and the South East.

How much deposit do I need for buy-to-let?

Most buy-to-let mortgages require a minimum deposit of 25% of the property value, though some lenders may accept 20%. Larger deposits (40%+) typically secure better interest rates and improve cash flow.

What is the interest coverage ratio (ICR) for buy-to-let?

The Interest Coverage Ratio (ICR) measures whether rental income covers mortgage interest payments. Most lenders require the rent to be 125-145% of the mortgage interest. This is stress-tested at higher rates (typically 5.5%) to ensure affordability.

Buy to Let Calculator

Calculate rental yield, cash flow, and return on investment for your buy-to-let property.

Property Investment Analysis

Determine if your buy-to-let investment will generate positive returns and meet lender requirements

Property Details

Property Purchase Price (£) Total purchase price

Deposit (%) Minimum 25% for most BTL mortgages

Expected Monthly Rent (£) Market rent for the property

Property Type

Mortgage Details

Mortgage Interest Rate (%) Current BTL mortgage rate

Mortgage Term (Years) Loan repayment period

Mortgage Type Most BTL use interest-only

ICR Stress Test Rate (%) Lender's stress test rate

Running Costs (Monthly)

Management Fee (% of rent) Letting agent fees (0% if self-managed)

Void Period (weeks/year) Expected empty period annually

Insurance (£/month) Landlord insurance

Maintenance (£/month) Repairs and upkeep allowance

Service Charge (£/month) For flats/leasehold properties

Ground Rent (£/year) For leasehold properties

Investment Analysis

Gross Yield

Annual rent ÷ Property price

Net Yield

After all expenses

Cash on Cash ROI

Annual return on cash invested

Monthly Cash Flow Summary

£0 Rental Income

£0 Total Expenses

£0 Net Cash Flow

£0 Annual Cash Flow

Income

Monthly Rent £0

Less: Void Allowance -£0

Effective Monthly Income £0

Expenses

Mortgage Payment £0

Management Fee £0

Insurance £0

Maintenance £0

Service Charge + Ground Rent £0

Total Monthly Expenses £0

Interest Coverage Ratio (ICR) - Lender Stress Test

ICR at 5.5% stress rate Checking...

Stamp Duty Land Tax (SDLT) - Additional Property Rates

Property Price £0

Standard SDLT £0

Additional Property Surcharge (5%) £0

Total SDLT Payable £0

Total Investment Required

£0

Deposit

£0

Stamp Duty

£2,500

Legal & Survey Fees (est.)

£0

Total Cash Required

5-Year Investment Projection

Year	Annual Cash Flow	Property Value (2% growth)	Equity Built	Total Return

Investment Tips

Consider the location carefully - areas with good transport links, schools, and employment opportunities tend to have lower void periods and better tenant quality.

Understanding Buy-to-Let Investment

What is Buy-to-Let?

Buy-to-let (BTL) is a property investment strategy where you purchase a property specifically to rent it out. Income comes from rental payments, and you may also benefit from property value appreciation over time.

Understanding Rental Yield

Gross Yield: (Annual Rent / Property Price) x 100
Net Yield: (Annual Rent - Expenses) / Property Price x 100
5-8% gross yield is generally considered good
Northern UK typically offers higher yields than London

BTL Mortgage Requirements

Deposit: Minimum 25% (some lenders accept 20%)
ICR: Rent must cover 125-145% of interest at stress rate
Income: Many require £25k+ personal income
Credit: Good credit history required
Age: Most require under 75 at end of term

Interest-Only vs Repayment

Interest-Only: Lower payments, better cash flow, no equity built
Repayment: Higher payments, builds equity, lower risk
Most BTL investors choose interest-only for cash flow
Need exit strategy for interest-only (sell property, remortgage, etc.)

Tax Considerations

Stamp Duty: 5% surcharge on additional properties
Income Tax: Rental profit taxed at your marginal rate
Mortgage Relief: Limited to 20% tax credit on interest
Capital Gains: Tax due when you sell (minus annual allowance)
Consider Ltd company structure for higher-rate taxpayers

Risks to Consider

Void Periods: No income when property is empty
Problem Tenants: Non-payment, property damage
Interest Rates: Rising rates reduce profitability
Property Values: Can fall as well as rise
Regulation: Increasing landlord obligations
Liquidity: Property is not easily sold quickly