Mortgage over payment

Loops2022

Hi I would like some advice about mortgage over payment please. My partner and myself are looking at two mortgages for our new house. One mortgage has £1500 cash back offer and for fixed 5 years you get one annual overpayment at 10% cap. The other mortgage had no cash back but is very similar except you can overpay monthly with an annual limit of 10% also. My question is it better to over pay mortgage on a monthly basis or annually, is annually building up lots of extra interest? The interest on the annual mortgage is calculated quarterly. I would appreciate any advice. Thank you 

Thrugelmir

The interest calculation will be based on the amount you owe daily. The early you make an overpayment the more interest you'll save in the longer term. Think of it as rolling a snow ball. 

getmore4less

which two lenders are those.

Single overpayment may be restrictive which lender has that limit.

Which lender is doing quarterly interest these days most have gone to daily balance.

can't say which might be better without the numbers 

Rate, fees, cashback, amount, term, payments,  overpayments(or max total) amount available monthly