197 NEW ISSUE 3% SAVINGS BONDS 1965-1975 Over £1,000,000,000 were invested in the previous issue. Here are some of the points which make Savings Bonds such an attractive investment. Post Office & Trustee Savings Bank Issues. Purchasable in multiples of £5, with minimum first subscription of £10. Maximum subscription £1,000. Interest paid half-yearly. Although subject to Income Tax the interest is paid in full, which means you will not need to make any rebate claims. Can be sold at any time through your Savings Bank.