"Extra savings" refers to additional money that is saved or set aside on top of the usual amount. It means having more money saved than what is necessary or expected. Full definition
You may qualify for extra savings if you purchase a silver plan. (magnifymoney.com)
Plus Shop Your Way members get extra savings on purchase price in addition to earning points on certain items. (digitalnewsreport.com)
If you can find extra savings in your budget, pay more off your mortgage or put those savings into paying off any credit cards or other debts. (moneysmart.gov.au)