With retirement planning, the benefits depend on the options you choose such as age you want to retire, a duration for which you want to receive benefits, health status, dependents and other commitments. Generally, if you choose the deferred annuity option and pay the regular premium until retirement, benefits in the form of annuity payouts start when you retire and the retirement corpus earns a bonus. With immediate annuity plans, the pension payments start in the first year after you pay your single lump sum premium. This has no bonus.