On 26 March, TSB and NatWest announced further rate rises, with two-year and five-year swap rates (the benchmark rates lenders use to price fixed mortgages) moving sharply upward. For SA operators with mortgaged properties, these increases directly affect your holding costs and pricing power on your listings. A week later, the market continues to feel the ripple effects.

TSB raises fixes by up to 45 basis points

According to Mortgage Strategy, on 26 March TSB pushed up prices on purchase deals across both residential and buy-to-let (BTL) properties. Two-year fixed rates rose 45 basis points, three-year fixes by 30 basis points, and five-year fixes by 25 basis points. These followed comparable TSB remortgage increases announced on 25 March.

For SA operators, this compounds the pressure. If you're holding a property on a two-year fix due to roll off within months, a 45 basis point rise means your refinance cost jumps immediately. That translates to tighter margins on your nightly rate - either you absorb the cost or raise prices and risk occupancy.

Market volatility triggers broader repricing

Swap rates climbed significantly on 26 March. Two-year rates rose 9.5 basis points and five-year rates increased 10.9 basis points against their close-of-business position on 25 March (Mortgage Strategy).

NatWest also announced further price hikes on product transfers (switching to a new deal with the same lender) and additional borrowing, though specific basis points were not disclosed.

Fleet Mortgages relaunched fixed-rate products after withdrawing them due to "extreme volatility" in swap markets. Coventry Building Society and Pepper Money similarly increased rates, signalling market-wide repricing across multiple lenders.

The pattern suggested this was not isolated. When lenders pull products and restart pricing, refinance windows tighten rapidly. If your SA property sat on a variable rate at that time, the gap between your cost and potential fixed-rate locks narrowed each day.

Planning your refinance in a rising-rate environment

A week on, the question for most SA operators is clear: what does this mean for your 2026 refinance plans? If you locked in a rate before late March, you're positioned well. If you're holding on a variable deal or facing a maturity in the next 6-12 months, the maths have shifted.

Rate rises of this magnitude don't reverse quickly. Lenders are repricing across the board. Refinance windows - the periods when you can lock in before your current deal matures - are shrinking as products withdraw and restart at higher pricing. For operators managing multiple properties or holding stock with tight margins, even 25-45 basis points can flip a deal from viable to marginal.

You may wish to contact your mortgage broker to map your maturity dates and current rate locks. Understanding which of your properties have the most runway, and which face imminent refinance, is worth doing sooner rather than later. Rate-lock options vary by lender and product, but the sooner you have clarity on your exposure, the sooner you can act. This volatility may settle, but it may equally drive further moves. Having a plan beats waiting for certainty.