How much money do I need to invest in property?

The deposit

The first and largest chunk of cash you need is the deposit. Buy-to-let mortgages work differently to residential mortgages. Most lenders require a minimum 25% deposit, meaning you need to put in at least a quarter of the purchase price from your own funds.

A 25% deposit at 75% LTV will get you a mortgage, but not the most competitive rates. If you can stretch to a 40% deposit (60% LTV), the rates improve meaningfully - often by 0.5-0.8 percentage points. Over a 5-year fixed term on a £112,500 mortgage, that difference can save several thousand pounds.

There is no such thing as a zero-deposit buy-to-let mortgage for a standard purchase. Some lenders will allow you to use equity in another property as security, but you still need net equity to deploy.

On a £150,000 purchase: - 25% deposit: £37,500 - 40% deposit: £60,000

Stamp Duty Land Tax (SDLT)

SDLT is a government tax on property purchases in England and Northern Ireland (Land Transaction Tax applies in Wales, Land and Buildings Transaction Tax in Scotland - different rates apply).

For a second or subsequent residential property, you pay the standard residential SDLT rates plus a 5% surcharge on every band. This surcharge applies even if you are buying via a limited company.

For a £150,000 additional residential property (2026 rates): - Up to £125,000 at 5%: £6,250 - £125,001-£150,000 at 7% (2% standard + 5% surcharge): £1,750 - Total SDLT: £8,000

Note that first-time buyer relief does not apply to investment purchases. The 5% surcharge has been in place since October 2024, when it was raised from 3%.

Legal and professional fees

Beyond the deposit and SDLT, a range of professional fees apply.

Solicitor / conveyancer: £1,000-£1,800 plus disbursements. Disbursements include local authority searches, land registry fees, and drainage searches. Total typically £1,500-£2,500 depending on the property and location.

Survey: A basic mortgage valuation is arranged by the lender and usually costs £200-£500. You should also commission your own independent survey. A RICS Level 2 survey (Homebuyer Report) costs £400-£700 for a typical terrace. A Level 3 building survey (more detailed, recommended for older properties) costs £600-£1,500. Do not skip the survey. An unexpected structural issue will cost far more than the survey fee.

Mortgage broker fee: A specialist buy-to-let broker is worth using, especially for limited company purchases. Expect a broker fee of £500-£1,500 depending on complexity. Some brokers charge a percentage of the loan instead.

Mortgage arrangement fee: Lenders often charge a product fee of £999-£2,000. This can sometimes be added to the mortgage, but adding it increases the amount of interest you pay.

On a typical £150,000 purchase, total professional fees are usually in the range of £3,000-£5,000.

The cash buffer

Once you own the property, unexpected costs will arise. A good landlord sets aside a cash buffer before and after purchase.

Void period buffer: A void of 4-6 weeks per year is a reasonable assumption. On a property renting at £700/month, that is £650-£975 per year in lost income. You need cash reserves to cover mortgage payments during voids.

Maintenance and repairs: The standard rule of thumb is 10% of annual rent held in reserve for maintenance. On £700/month, that is £840/year. Boilers cost £1,500-£2,500 to replace. Roofs cost far more. Old properties need more maintenance than new builds.

Initial setup costs: Cleaning, minor repairs, and making the property lettable before the first tenant moves in can cost £500-£2,000 depending on condition.

A sensible buffer is 3-6 months of the mortgage payment, held in cash, before you start. This protects you if the property sits empty initially or needs work.

The full picture on a £150,000 purchase

Putting it all together for a standard £150,000 investment property with a 25% deposit:

- Deposit (25%): £37,500 - SDLT: £8,000 - Solicitor and searches: £2,000 - Survey (Level 2): £500 - Mortgage broker and arrangement fee: £1,500 - Cash buffer (3 months mortgage at 5.2% on £112,500): £1,462

Total cash required: approximately £51,000

That assumes nothing needs doing to the property before letting, no refurb, and the mortgage completes smoothly. In practice, add a contingency of £2,000-£3,000 for the unexpected.

At 40% deposit, the deposit rises to £60,000 but SDLT and professional fees remain the same. Total cash increases to approximately £73,000, but the lower mortgage balance and better rate will improve monthly cashflow.

There is no getting around this: buying a UK investment property requires meaningful capital. The entry costs alone mean you need the investment to perform over several years to recoup what you spend before the first tenant even moves in.

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