Most landlords do not hire a landlord accountant until something goes wrong. A letter from HMRC. A sale with a 60 day clock. Or a tax bill that looks nothing like the rent received. By then the cheap fixes have gone. This guide covers what a landlord accountant does, where landlords lose money alone, and how to spot a property accountant worth paying.
A landlord accountant earns their fee on any mortgaged or higher rate portfolio. Individuals get a 20% credit for mortgage interest. A company deducts the same interest in full and pays 19% on its first £50,000 of profit. The errors a general practice makes on repairs, Form 17 and structure each cost more than the fee.
What's New in 2026 for Landlords and Property Investors
Three dated changes matter this year.
Making Tax Digital for Income Tax started in April 2026. It applies to qualifying income over £50,000, which means gross rent, not profit. The threshold falls to £30,000 in April 2027 and £20,000 in April 2028.
Dividend tax rose on 6 April 2026. After a £500 allowance the rates are 10.75%, 35.75% and 39.35%. That bites when you take money out of a company.
From 6 April 2027, property income gets its own rates: 22%, 42% and 47%. Every landlord holding in their own name pays two points more on the same rent. Any landlord accountant still working from the old rates is a year behind.
Key Takeaways
- Individuals get a 20% basic rate credit on mortgage interest under Section 24. A company deducts it in full.
- Corporation tax is 19% on the first £50,000 of profit and 25% above £250,000, against 40% income tax.
- Making Tax Digital starts at gross rent over £50,000 from April 2026, £30,000 in 2027 and £20,000 in 2028.
- Married couples are taxed 50/50 by default on jointly held property, whatever the deeds say. Form 17 changes that.
- Replacement of domestic items relief covers the replacement of furniture, white goods and carpets, never the first purchase.
- Approved mileage rose to 55p for the first 10,000 business miles from 6 April 2026, then 25p.
What a Landlord Accountant Actually Does
A landlord accountant handles the compliance, then does the part that pays for itself. The visible half is the SA105 property pages of your Self Assessment tax return, the allowable expenses behind them, and the quarterly updates Making Tax Digital now demands. Miss those deadlines and penalties follow.
The valuable work happens before the tax year closes
Compliance records a year that has already gone. Tax planning changes a year you can still act on. A good landlord accountant times a capital spend, checks whether a spouse has unused basic rate band, and models what the portfolio would pay inside a company.
A property sale is a separate job with its own clock
Capital gains tax on a rental property runs at 18% or 24%, reported and paid within 60 days of completion. A landlord accountant brought in after completion can only file. One brought in earlier changes the timing, the ownership split and the reliefs claimed.
Where Landlords Lose Money Filing Alone
A general practice sees a handful of landlords a year against hundreds of trading clients. Property is a specialism inside a specialism. The same five errors turn up on buy-to-let returns a landlord accountant reviews.
- Repairs booked as improvements. A like-for-like replacement is a deductible repair. Treat it as capital and the tax relief waits years.
- Missed replacement of domestic items relief. Replacing a fridge, a carpet or a sofa in a let flat is claimable. It sits outside the usual allowable expenses list, so generalists forget it.
- No Form 17 where a spouse has unused basic rate band. Form 17 moves the taxed share to the person with room in the 20% band, if the beneficial ownership genuinely differs.
- Mortgage interest claimed as a deduction. Section 24 replaced the deduction with a 20% credit. Claiming it the old way creates a liability, not a saving.
- No structure review. A higher rate landlord can hold personally for a decade with nobody modelling the alternative.
Capital allowances run the other way. You cannot claim them for plant inside a home you let. They do apply to equipment used to run the business.
Worked Example: One Rental Year, Filed Twice
Priya is a pharmacist earning £68,000. She owns Flat A alone and Flat B with her husband Tom, who earns £16,000. Rent for the year is £31,200 and mortgage interest is £11,000. A general practice filed the return and claimed £7,400 of costs.
- Profit before interest: £23,800
- Tax at 40%: £9,520
- Finance cost credit, 20% of £11,000: £2,200
- Tax due: £7,320
A landlord accountant rebuilt the same year and found two claims and one election.
- A £2,300 window replacement, booked as capital, is a like-for-like repair.
- £1,150 of replacement of domestic items relief on a fridge-freezer, a sofa and carpets.
- A Form 17 election moving 75% of Flat B to Tom, who has unused basic rate band.
Corrected costs are £10,850, so profit before interest is £20,350. Flat B produces £9,000 of that profit and £4,400 of the interest.
- Tom, 75% of Flat B: £6,750 at 20% is £1,350, less a credit of £660, so £690.
- Priya, 25% of Flat B: £2,250 at 40% is £900, less a credit of £220, so £680.
- Priya, all of Flat A: £11,350 at 40% is £4,540, less a credit of £1,320, so £3,220.
- Tax due: £4,590
The year moves by £2,730, and the Form 17 election keeps working after.
These figures are illustrative, not a quote or a promise. Form 17 only works where the beneficial ownership genuinely is 75/25, set out in a deed.
Book a free consultation through the contact form. We will explain what a review covers, and agree a fixed fee first.
Section 24 and Why Structure Is the Biggest Lever
Section 24 is why most higher rate landlords overpay. Individuals no longer deduct mortgage interest from rental income. They get a basic rate credit worth 20% of it instead. Taxable property income now includes money that went straight to the lender.
Companies sit outside Section 24. A limited company deducts finance costs in full and pays corporation tax at 19% on its first £50,000 of profit. It also files annual accounts at Companies House, so the running cost is real.
Stamp duty is not the argument against a company
The 5% surcharge on additional dwellings applies whether you buy personally or through a company, so anyone who already owns a home pays the same stamp duty land tax either way. A 17% flat rate only hits a single dwelling over £500,000 held outside a rental business.
The switching cost only runs one way
Buying personally now and moving to a company later is costly. The transfer is a disposal at market value: capital gains tax for you, stamp duty for the company, and a new mortgage. Your tax band is not fixed either, and most landlords hold long term. The honest exceptions are narrow: a short hold, an unmortgaged property, or needing the rent as income now.
How to Find a Good Property Accountant, and What It Costs
Five checks separate a landlord accountant who lives in property tax from a general practice that will take the work anyway.
Qualified and regulated comes first
Ask which body they qualified with, and who regulates them for tax work. Anyone in the UK can call themselves an accountant. Regulation gives you cover if the advice is wrong.
Property specialism, not a general practice with a few landlords
Ask how many landlords and property investors they act for, and what share of the fees that is. Then ask a property question. How they handle a Form 17, or when capital allowances apply, tells you plenty.
A fixed fee agreed upfront, in writing
Pricing is built from your portfolio, not an hourly rate. The number of properties moves it, and so does a company, a sale in the year, and the state of your records. A landlord accountant should quote a fixed fee in writing after a free consultation.
They work from your records, then review the structure
Bookkeeping stopped being admin when Making Tax Digital made record keeping the input to four filings a year. Ask how they run annual accounts and quarterly updates together.
Compliance keeps you legal. A structure review changes the bill. Good landlord accountants put the alternative in front of you once a year, and a generalist never does.
Frequently Asked Questions About Landlord Accountants
It is worth paying when the landlord accountant finds more than they cost. On a mortgaged or higher rate portfolio that is the normal outcome, not the lucky one. The cost of filing alone is a penalty, an enquiry, or a quiet overpayment for years.
Fees turn on the number of properties, whether a company is involved, whether a sale falls in the year, and the state of your records. Ask for a fixed fee quoted in writing after a free consultation, covering the rental accounts and the tax return.
Most landlords do. Gross rent above the £1,000 property allowance normally brings you into Self Assessment, even in a year when the tax works out at nil. Register by 5 October after the tax year ends, then file by 31 January.
Section 24 stopped individuals deducting mortgage interest from rental income. You are taxed on the profit before finance costs. A basic rate credit worth 20% of the interest then comes off the bill. A higher rate landlord loses half the old relief.
Three legitimate levers reduce exposure to the 40% band. Move income to a spouse with unused basic rate band using Form 17. Make a pension contribution that widens your basic rate band. Or hold through a company that deducts interest in full.
HMRC matches outside data against filed returns: Land Registry records, letting agent returns, tenancy deposit data, mortgage records and short let booking sites. A mismatch is the usual reason a landlord gets a letter. The Let Property Campaign is the cheaper door.
Verdict on Hiring a Landlord Accountant
A landlord accountant is worth hiring the moment your position stops being simple. One unmortgaged flat with tidy records does not need one. A mortgage changes that, and so does a second property, a spouse in a different tax band, or a sale on the horizon. Each is a place where a general practice quietly leaves money behind.
Three checks are worth making before the next 31 January. Whether your repairs are claimed as repairs. Whether a Form 17 election is sitting unused. Whether a higher rate landlord should hold property personally at all, given property income gets its own 42% rate from 6 April 2027.
Book a free consultation through the contact form. We will explain what the work involves and agree a fixed fee before anything starts.
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