Few contractors stay in one IR35 lane for a whole career. You might take an inside-IR35 role between outside contracts, move to a client who determines your engagement differently, or shift structures as the market changes. Each move changes the shape of your income — and lenders notice. This article covers what a status change means when you are buying, and how it is handled when you come to remortgage.
Principles here are stable; exact lender figures are confirmed at application, and IR35 status is a tax matter for you and your accountant.
Moving outside IR35
Moving to an outside-IR35 engagement improves both your take-home and your mortgage position, because your company can invoice the full contract value and a day-rate lender will assess that full rate. The one thing to watch is history: if you have just moved outside and set up or restarted a limited company, an accounts-based lender will find little trading history to read. A day-rate lender solves this by assessing the current contract rather than the accounts — so being newly outside is far less of an obstacle than it first appears, provided you choose the right lender.
Moving inside IR35
Moving to an inside-IR35 engagement lowers your take-home, because tax and National Insurance are deducted at source. But it does not have to lower your borrowing, because a lender that assesses the gross contract value will still read the full rate. Inside roles often carry a rate premium to offset the lower take-home, and at a gross-value lender that premium works in your favour — a higher inside rate can support more borrowing than the outside rate it replaced. The move is a tax change; whether it is a mortgage change depends entirely on the lender.
What happens at remortgage
At remortgage, the lender reassesses your current position — your current contract and structure — rather than the one you had when you first borrowed. So if your status has changed since your last mortgage, the remortgage is assessed on where you are now. This is usually straightforward, but it means two things: first, if you have moved inside, choose a remortgage lender that assesses gross; second, if you are mid-transition or between contracts, the timing of the remortgage matters, because the assessment reflects your position at application and at offer.
A product transfer — staying with your existing lender on a new rate — can sometimes sidestep a full reassessment, which is worth considering if your income shape has become harder to place temporarily. Whether a product transfer or a full remortgage serves you better is a case-by-case comparison.
Worked example
Illustrative only. A contractor moves from a £520-a-day outside role to a £600-a-day inside role:
- Outside, £520 a day:520 x 5 x 46 = £119,600 assessed → around £538,000 at 4.5x.
- Inside, £600 a day, assessed on gross:£138,000 assessed → around £621,000.
- The inside role borrows moreat a gross-value lender — the rate premium outweighs the status change, provided the lender assesses gross.
Where to take care
The main risk is a status change landing in the middle of a live application or remortgage. Lenders reassess up to offer, so a contract that changes terms, or a move between inside and outside, should be disclosed to your adviser at once — it can usually be managed by adjusting the lender or the timing, but only if it is known. Beyond that, keep evidence of continuity across the change: a clear work history that shows the thread through a status move reassures any lender.