Nationwide Building Society may not offer offset mortgages, but it does offer flexibility with all its new mortgage products. All Nationwide flexible mortgages calculate interest daily. Borrowers who take a Nationwide flexible mortgage deal can switch from a tracker deal to a fixed rate deal at any time without paying early repayment charges on the tracker mortgage. However, a reservation fee for this suburb product will be due.
Nationwide flexible mortgages offer borrowers the chance to overpay on their mortgage, up to a limit of £500 a month, without charge. There is also one flexible mortgage product which allows unlimited overpayments, the Base Mortgage Rate. Borrowers with Nationwide flexible mortgages can use the overpayment facility to repay their mortgage early. They can also borrow back any overpayments at any time.
With Nationwide flexible mortgages, borrowers can take payment holidays of between 3 and 12 months, after they have held the mortgage for a year. 
The mortgage must be less than 80 per cent of the value of the property at the end of the payment holiday and certain other conditions also apply. However underpayments and payment holidays could increase the mortgage term and/or the total amount payable
Nationwide does not impose a higher lending charge on its flexible mortgage products. People looking to remortgage to nationwide currently pay valuation and legal fees.
Nationwide flexible mortgages for homebuyers include the Base Mortgage rate. There is a fully flexible mortgage with a current rate of 5.58 per cent, with an annual percentage rate of 7.1 per cent. This is available up to 90 per cent loan to value. Remember, rates can change quickly, so be sure to check for the latest deals before making a decision.
All Nationwide flexible mortgages track the base rate by a certain percentage. Some deals have a high initial rate and a low long term rate, while others have a low initial rate with a higher long term rate.The two year tracker is available at an APR of 7.1 per cent,with fees ranging from £499 to 
£1,999 depending on the option chosen. The lifetime tracker comes in at 6 per cent, depending on the loan to value. This Nationwide flexible mortgage also have reservation fee-free options, with the two year deal start at 0.34 per cent above Bank of England base rate.
The Nationwide flexible mortgages also have fixed rate versions for periods of two to twenty five years. At the end of the fixed rate period, the interest rate reverts to the base mortgage rate. Depending on the loan to value and the fixed rate period, the deals are available at APRs of between 5.63 and 6.45 per cent, with reservation fees of between £499 and £1,999. For the versions without reservation fees, these Nationwide flexible mortgages come in at 7.1 per cent APR.
Nationwide flexible mortgages are also available to remortgage customers with both fixed and tracker rates*.
High street presence for ease
Inflexible lending criteria compared to other lenders
overpayments/underpayments
