Three months ago, tracker mortgage holders had reason to celebrate as the Bank of England cut the base rate to 3.75%. Now the picture is getting more complicated. The Bank's latest Monetary Policy Committee (MPC) meeting - the body that sets UK interest rates - kept rates on hold, but the minutes point to a new risk: the Iran conflict and what it could do to inflation and, ultimately, your monthly payment.

Here are five things property investors need to know.

1. Rates held - but the language changed

The Bank held the base rate at 3.75%, according to BBC News Business reporting on the April 2026 MPC meeting. That is the headline figure. But the committee's language shifted. Members flagged that the Iran war is creating fresh uncertainty around oil prices, supply chains and inflation - the factors that drive rate decisions. Held does not mean safe. The MPC is watching.

2. The Iran conflict is now a mortgage risk

Oil prices typically rise when conflict hits a major producer region. Higher oil means higher energy bills. Higher energy bills push up the inflation figures the Bank of England uses to set rates. The BBC reports that MPC members discussed scenarios in which the conflict could trigger multiple rate rises - not a single nudge upwards. For anyone on a tracker or standard variable rate (SVR - your lender's default rate, usually the most expensive option), that is a direct hit to your monthly payment.

3. What the numbers mean for BTL investors

Run the numbers. On a £200,000 BTL mortgage at 75% LTV with a tracker rate of base plus 2% (currently 5.75%), your approximate monthly interest payment on an interest-only basis is around £958. A single 0.25% rise takes that to £1,000 - an extra £42 per month. Two rises of 0.25% each adds approximately £83 per month. Three rises would push the extra monthly cost to around £125. These figures are illustrative and based on interest-only calculations; always check your specific product terms with your broker.

4. Jobs and bills are part of the same picture

The Bank's five takeaways, as summarised by BBC News Business, cover more than just rates. Wage growth, energy bills and employment data all feed into the same inflation calculation. For landlords, this matters in two ways. Tenants under financial pressure are more likely to fall into arrears. And lenders use stress tests (checks that your rental income covers the mortgage at a higher rate, confirming that rental income still covers the cost) when assessing new applications - rising rate expectations make those tests tougher to pass.

5. What to do before rates move

Fixed rates give certainty. Tracker rates are cheaper right now but carry the upside risk the MPC has just flagged. You may wish to review your current product expiry dates and model your cash flow at 4.25% and 4.5% base rate scenarios. Speak to your broker about what fixed rates are available today and whether the cost of locking in is worth the peace of mind given the Iran risk. If your fixed rate expires in the next six months, this conversation may be worth having sooner rather than later.