Growing a property portfolio tax-efficiently

It depends mainly on your tax rate and what you'll do with the profits. If you're a higher or additional rate taxpayer with a mortgage, and you'll reinvest the rent, a company often comes out ahead because profits are taxed at 19% to 25% and interest is fully deductible. If you need the income to live on, or you're a basic rate taxpayer, owning personally may be simpler and cheaper.

It can. Profits kept in a company aren't your personal income, so they don't count towards the £100,000 level where your personal allowance starts to be withdrawn. Rental profits you own personally do, and Section 24 can push your taxable income higher. Buying new property through a company, and only drawing what you need, can stop your income creeping over that threshold. Dividends you do take out count as your income.

Yes, and many landlords do. Existing properties often stay in personal names, because moving them would trigger capital gains tax and SDLT, while new purchases go into a company. That leaves two sets of accounts and returns, and two ways of drawing income. It works well when the company is used to reinvest profits and the personal properties provide your income.

Often, if one of you pays less tax. Rental profits from property you own jointly as a married couple are split 50:50 by default. If you own it in unequal shares, you can make a declaration on Form 17 so you're each taxed on your actual share. It must reflect real beneficial ownership and reach HMRC within 60 days. Joint ownership also uses two capital gains tax allowances on a sale.

HMRC updated its guidance in July 2026. Interest is allowable only where the borrowed money funds business expenditure, and a capital account that isn't overdrawn doesn't settle the question by itself. Money drawn out to buy another rental property is usually fine. Money used for a home, a car or school fees can mean the interest on that part isn't relievable. Check the position before you refinance, not afterwards.

Refinancing an existing rental property and using the money to buy another rental property generally keeps the interest within your property business, so it gets the same relief as other mortgage interest. If the new property will be in a company, you can lend the money to the company. The company pays your loan back tax-free when it can, while it gets full relief on its own borrowing.

Profits in a company can be reinvested after corporation tax at 19% to 25%, without paying income tax first. Personally, you pay income tax at up to 45% (47% from April 2027) before reinvesting. That difference compounds over years, which is why companies suit landlords who are building rather than living off the portfolio. A Family Investment Company can add inheritance tax benefits too.

Yes, if they genuinely do the work and the pay is reasonable for what they do, such as viewings, tenant liaison or bookkeeping. Wages paid on those terms are a deductible cost of the property business, and they're taxed as the child's income, where their personal allowance may cover them. Pay that's more than the work is worth, or for work that isn't done, isn't deductible. Keep records of hours and tasks.

Usually around a natural trigger: a remortgage when fixed rates end, a change in your income, a plan to sell or gift, or the new property income rates from April 2027. Restructuring has costs, mainly capital gains tax and SDLT, and conditions like the business test for incorporation relief. The best time to look is before you sign a new mortgage deal, so the lending fits the structure.

It depends on the state of the property when you bought it. Repairs to a property that was already fit to let, such as redecorating or replacing a worn kitchen with a similar one, are usually deductible. If the property couldn't be let until the work was done, and the price reflected that, the work is usually capital. Capital costs aren't deductible against rent, but improvements can reduce the gain when you sell.

As your rental profits rise, so do your payments on account. Under Self Assessment you usually make two advance payments towards the current year's tax, on 31 January and 31 July, with a balancing payment the following 31 January. A big jump in profits can mean a large first bill, because the balance and the first payment on account fall due together. If profits will fall, for example after a sale, you can apply to reduce the payments.

The rates don't rise with the number of properties you own, but every residential purchase as a landlord pays the 5% higher-rates surcharge. Multiple dwellings relief has gone, so buying several houses together no longer reduces SDLT, unless you buy six or more in a single transaction and choose non-residential rates. A company buying a dwelling over £500,000 can face 17% unless a relief applies.

Think carefully first. Profits kept in a trading company can be invested in property without paying personal tax to extract them, which is tempting. But significant investment property can make the company fail the trading tests for Business Asset Disposal Relief and reduce Business Relief for inheritance tax. A separate property company, perhaps under a common holding company, is often better. If you've already done it, see our page on separating property from a trading business.

Each of you is taxed on your share of the profits and of any gain, which normally follows your beneficial ownership. Owning property jointly doesn't by itself make you a partnership for tax. If you want a defined arrangement, a declaration of trust, a formal partnership, an LLP or a jointly owned company can each work, with different tax results. Agree what happens if one of you wants to sell before you buy.

If you're UK resident, rent from overseas property is taxable in the UK, but it's treated as a separate overseas property business. Losses from it can't be set against UK rental profits, or the other way round. Tax paid in the country where the property is can usually be credited against the UK tax on the same income. Local taxes, ownership rules and inheritance laws abroad need local advice as well.

The purchase price, SDLT, legal fees and survey costs are capital. They aren't deductible against rent, but they're added to the property's cost and reduce the gain when you sell. Mortgage arrangement and broker fees are finance costs, which for individuals get the same basic rate tax credit as interest. Costs of letting the property, such as agent fees for finding tenants, are deductible against the rent.