Do your best
The hypothetical examples above represent what-if scenarios that aren't always possible to replicate in real life. For instance, you may not be able to invest the same amount each year or you may have to skip some years altogether. That's okay. Take small steps toward saving 12%–15% of your gross income (including employer contributions) each year.
Maybe you don't have the financial flexibility to make a lump-sum investment in your IRA in January or April—or any other month, for that matter. That's okay too. Try setting up recurring automatic bank transfers. Making contributions twice a month over the course of 30 years (for a total contribution of $210,000) and earning a 4% average annual return would result in an end balance smaller than Example A but bigger than Example B. Not too shabby.
Want to get a better handle on your retirement goals? Use our retirement income calculator to review your progress so far and determine how much money you may need in the future.
If you're making an IRA contribution, no matter the amount and timing, you're on the right track. But if you happen to find yourself in the position to make your annual IRA contribution before the following year's tax-filing deadline, go for it!