Accidental landlord? What MTD means for your old home

Plenty of people become landlords without meaning to: a move for work, a relationship, a flat that would not sell. If you are collecting rent, HMRC sees a property business, and the same rules apply as to someone with a portfolio. Here is the short version for the accidental landlord.

You have to tell HMRC

Rental profit is taxable income. If you are not already in Self Assessment you register, and you report the rent and expenses each year. Property income under £1,000 a year is covered by the property allowance and needs no return; almost any real let is above that.

Mortgage interest is not an expense any more

This catches nearly everyone. Since 2020 you cannot deduct mortgage interest from rental income. Instead you get a tax credit worth 20% of the interest. If you are a basic-rate taxpayer that comes to the same thing; if the rent pushes you into the 40% band, it costs you real money. The Section 24 guide explains it and the tax calculator shows the effect on your own numbers.

Consent to let and the mortgage

Not a tax point but an important one: a residential mortgage usually requires the lender's consent to let, and insurance for an owner-occupier does not cover a tenant. Sort both before the tenant moves in.

Does Making Tax Digital apply?

Only if your gross rent, plus any self-employment turnover, passes the threshold: over £50,000 already, over £30,000 from April 2027, £20,000 or more from April 2028. One let home is usually under those figures, so most accidental landlords stay on annual Self Assessment for now. Check yours with the MTD checker, and see the post on MTD with one rental property for the detail.

Keep the records anyway

Whether or not MTD applies, you need the rent and every expense recorded, and you need to know which expenses are allowable: repairs yes, improvements no, agent fees yes, your own time no. The allowable expenses guide lists them, and the free expense tracker is set up with HMRC's categories so the figures are in the right shape from day one.