The common percentage you should allocate to savings should be 20% from your gross salary based from the 50/20/30 budget. So, let's say Ana is 20 years of age and has 45 more years before retirement. Her annual gross income should be $45,720 and we get 20% out from it, that will give us $9144 - her savings for a year. Considering she will still work for 45 years more, that will give her a savings of $411,480.