Nationwide's 8% reg saver - issue paying in.

Nebulous2

When you've got the money available is the best time to open a regular saver. Interest is calculated daily, so the more you can stuff in, for the longest time possible, the better. If payments are based on a calendar month, as many of them are, then you can squeeze in 13 payments. 

My pension gets paid on the 20th of the month, so I generally start one after that. I then make another payment on the 1st of the next month, and on the 1st of each subsequent month. That means in the final month I've made 13 payments by the 1st, and get 20 / 21 days interest on the full amount, £3250 on a £250 monthly payment, or £3900 on a £300 monthly payment, by the time of the anniversary / maturity. 

Kim_13

I paid into mine this month from my Chase account, so payments from external accounts are definitely possible.

Chase don’t to my knowledge have COP so this might be the answer - it depends whether your bank allow you to overrule a ‘no match.’ (Or whether Nationwide savings accounts can be correctly checked for COP in due time.)