What renting actually costs a landlord

What follows is the working version of the cost of letting: the decisions in the order you actually meet them, with the reasoning attached.

Gross yield is not a return

Gross yield is annual rent divided by purchase price and takes no account of any cost of operating. Net yield after voids, maintenance, insurance, compliance, management and finance is a very different number. Comparing properties on gross yield systematically favours the ones with the highest hidden costs.

Yield also describes only one of the two returns, since the capital position — what the property is worth against what is owed on it — moves independently of the rent and can dominate the outcome in either direction over the period an owner actually holds it.

Voids are a planning assumption

No property is let one hundred per cent of the time, and turnover between tenancies costs rent plus re-letting fees plus refresh. Assuming a few weeks of void per year is realistic; assuming none is why some portfolios underperform their spreadsheets. Longer tenancies are worth conceding on rent for, because a stable tenant is cheaper than a slightly higher rent.

In practice, arrears sit alongside voids as a separate line, because a tenant who stops paying occupies the property while producing no income, and recovering possession takes months in most jurisdictions, which makes it a longer and more expensive event than an empty flat.

Compliance is a growing recurring cost

Safety certification, energy efficiency requirements, licensing schemes and deposit protection all carry cost and administrative time. Requirements change, and retrofitting to a new efficiency standard can be a substantial capital cost with no rent increase attached. These are increasing in most markets rather than decreasing.

For most people, the penalties are structural as well as financial in several systems, where a landlord who has not complied with certification, licensing or deposit rules can be barred from serving a valid notice until they have, which turns a paperwork lapse into an inability to recover the property at all.

Maintenance is not optional

A rented property wears faster than an owner-occupied one and repairs cannot be deferred in the same way. A common planning figure is around one per cent of value annually, plus periodic larger items. Responsiveness also determines tenant retention, which loops back into voids.

The split of responsibility is set by law as much as by the agreement in most countries, with structure, heating, water and sanitation typically sitting with the landlord whatever the contract says, and out-of-hours emergency call-outs priced well above the same job booked in normal working time.

Tax changes the arithmetic

The treatment of mortgage interest, allowable expenses and capital gains varies by jurisdiction and has changed sharply in several. A leveraged rental that worked under one tax regime can be loss-making under another with no change in rent. This is a question for an accountant in your jurisdiction rather than an article.

Where it helps most, the structural decisions are also the hardest to unwind, since moving a property between personal and corporate ownership is usually treated as a disposal with all the taxes and costs that follow, which is why the ownership question is worth taking advice on before the first purchase rather than after the third.

None of this is a substitute for talking to a clinician if something feels wrong.

The financing and the insurance are different products

Letting a property bought on residential mortgage terms without the lender's consent typically breaches the mortgage conditions, and consent to let is normally a formal application carrying a fee or a rate change rather than a courtesy. Buy-to-let lending is commonly assessed on the rent the property can achieve against the interest cost at a stressed rate rather than on personal income, which is why a purchase that looks affordable to the buyer can still fail the lending test.

In practice, a standard home insurance policy generally stops responding once a property is let, and landlord cover is a separate contract with its own conditions about tenant type, inspection frequency and unoccupied periods between tenancies. Both interact with tax and with local licensing in ways that vary enormously between jurisdictions, so the arithmetic is worth working through with an accountant and a broker in your own country rather than from figures quoted for somewhere else.

The takeaway

Model voids, maintenance and tax before you model profit.

Pick the one that costs you least, and let the rest wait.