How to Get 10% Guaranteed Interest in an SDP (Savings Deposit Program -- Military Only) – This is a place for the community to provide tips and advice on How to Get 10% Guaranteed Interest in an SDP (Savings Deposit Program -- Military Only). This topic was created by Dennis Stephens and the tips are provided by the community. The tips you add here can be your own or referred from another site. The best tips are then ranked at the top when up-voted by members of the community.