Mortgages for doctors and locums

Locum doctors and dentists are often underassessed because their income looks irregular on paper — varied shifts, multiple payers, and sometimes a mix of NHS and private work. The right lender reads locum income properly, recognising the strength and continuity of medical work rather than treating variable shifts as unreliable. Many lenders also treat medical professionals favourably, so the outcome hinges on which lender you apply to.

Why do locums get underassessed?

Answer first: because locum income looks irregular on paper even when it’s strong and entirely continuous. Shifts vary week to week, payments may come from several trusts or practices, and the pattern doesn’t fit the neat monthly payslip a lending process was built around. A rigid lender sees variability and gets cautious — regardless of how reliably the work actually comes in.

The reality is almost the opposite of what the paperwork suggests. Medical work is among the most consistently in-demand there is; a locum doctor’s ability to find shifts is not a fragile thing. The problem is one of translation — getting the lender to read the income for what it is. Our doctors and locums page sets out how we approach it.

How do lenders actually assess locum income?

There’s no single method, and that’s precisely why the outcome varies so much. Broadly, you’ll meet one of three approaches:

Averaging recent earnings. The lender takes your income over a recent period and works from the average. Reasonable, though it can be dragged down by a quiet spell that wasn’t representative.

Reading the contract or shift pattern. Some lenders will work from your current arrangement and expected pattern, closer to how contract-based underwriting treats a day-rate contractor. This is often the most favourable and the most accurate.

Treating you as generic self-employed. The lender works from tax-return profit — which, being minimised for tax, understates what you earn. This is the approach that produces the disappointing quotes.

Same doctor. Same income. Three very different borrowing figures. The lender you apply to is not a detail; it is the answer.

Mixed NHS and private income

Many medical professionals hold a combination — employed NHS work alongside self-employed locum or private practice. A lender that only counts one and ignores the other can cut your assessable income substantially, sometimes in half.

The right lender considers both together. That’s frequently the single biggest lever available to a doctor with mixed earnings: not arguing about the rate, but finding a lender that counts all of what you actually earn. If you’ve been quoted a figure that felt far too low, it’s worth checking whether half your income was quietly left out of it.

Do doctors get better treatment?

Sometimes, yes. A number of lenders view medical professionals favourably, reflecting the stability of the profession and its earning trajectory, and a few offer enhanced criteria for qualified medics. It isn’t universal and it doesn’t override affordability — but it’s another reason the choice of lender, rather than the headline rate on a comparison site, tends to decide your outcome.

It also means a doctor who has been given a poor answer by one high-street lender should be extremely slow to conclude that the market’s answer is no. Very often it simply means you asked the wrong one.

What if you’ve only recently gone locum?

Continuity carries the case. If you’ve moved from a salaried NHS post into locum work in the same field, that’s a continuation of established professional experience, not a speculative new venture — and lenders that understand this weigh it accordingly. It’s the medical equivalent of the contractor who leaves employment to contract in the same specialism.

So a short trading history is far from fatal. Some lenders will work from one year’s figures, and some from your current arrangement — see mortgages on one year of accounts and mortgages without an SA302 for the evidence routes. Make the continuity explicit rather than leaving the lender to infer it.

Protecting the income the mortgage depends on

One point worth making plainly, because it’s easy to skip. A locum has no employer sick pay — if you can’t work the shifts, the income stops, while the mortgage doesn’t. That’s the same exposure any self-employed professional carries, and it’s why income protection belongs in the conversation alongside the mortgage, not as an afterthought years later.

The cover that matters here is own occupation wording — a policy that pays if you can’t do your own job, which for a specialist is the whole point.

The bottom line

Locum doctors and dentists are frequently underassessed, not because their income is weak, but because it’s read badly. The right lender treats locum work as the strong, continuous professional income it is, combines NHS and private earnings rather than ignoring one, and may treat medics favourably on criteria. If a high-street quote has left you thinking you can’t borrow enough, the likeliest explanation is the lender, not you. To be assessed properly, speak to an adviser.