Does Salary Sacrifice Affect Your Mortgage? What Lenders See

Salary sacrifice reduces your gross salary on paper — which is exactly what mortgage lenders look at. This is the main practical downside of the strategy.

How lenders assess you

Most lenders use your contractual salary (post-sacrifice) as the basis for affordability. At a typical 4.5× income multiple, every £1,000 reduction in stated salary costs you £4,500 in borrowing power.

What you can do

• Ask your employer for a letter confirming the sacrifice arrangement and your “notional” pre-sacrifice salary
• Some lenders will use the higher pre-sacrifice figure — worth asking a broker to shop around
• Consider pausing the sacrifice temporarily when applying for a mortgage (subject to scheme rules)

Is it still worth it?

For most people, yes. The NI saving on salary sacrifice typically outweighs the minor reduction in borrowing capacity — especially if you're not near your maximum mortgage size. But if you're stretching to buy, factor this in before increasing contributions.