Mortgage offers are prepared before completion takes place and are based on an assumed start date. The higher figure shown covers pro-rata interest from that assumed date to the end of the month, plus a full month’s payment. Once your mortgage completes on the actual date, your lender will recalculate and confirm the precise first payment amount in your welcome letter.

Your first payment is higher because it covers two things — interest charged from the day your mortgage completes to the end of that month, plus a full month’s payment for the month that follows. From month two onwards your payment returns to the regular amount shown in your mortgage illustration.

Not always. Depending on when your mortgage completes, there may not be enough time for your lender to set up the direct debit for your chosen date. Your lender will notify you of the exact date and amount of your first collection. From the second month onwards your direct debit will run on your selected date as normal.

If your mortgage completes late in the month, the pro-rata interest element will be small — covering only the final few days. However, your lender may not have enough time to collect the first direct debit on your chosen date and may take it a few days later instead. In the example of a 29th March completion with a 5th April direct debit date, only two additional days of interest applied — adding just £57.12 to the regular monthly payment.