How Much Income Do I Need in Retirement?

by Bob French, CFA

Most people are focused on saving for retirement so they’ll have the money they need. However, ask most people how much they’re going to spend in retirement and they have no idea. To plan for retirement effectively, you need to have some sense of what your spending needs are actually going to be.

Knowing what you’ll spend helps you know how much you need to save. Just like everything else in finance, figuring out how much you will spend in retirement is a big “it depends.” Most folks want to carry the same standard of living into retirement they had while working. Same standard of living, same cost of living, right? It’s not quite that simple. Retirement changes everything, including how you determine your budget.

One common approach is to find your “replacement ratio.” This is found by taking the income you made immediately prior to retirement and figuring out what percent of that income you think you’ll spend every year. The amount you’ll spend is the amount you’ll need to replace every year in one way or another.

Most people end up needing less income in retirement than they did while working, because, among other smaller reasons:

  • You don’t need to save for retirement anymore;
  • You don’t have job-related expenses anymore (commuting, clothes for work, eating out for lunch);
  • You aren’t paying as many taxes since you’re income is lower.

While a lot of expenses will go down, you’ll also want to consider expenses that tend to go up in retirement, such as travel or other leisure activities you’ll have more time for. Depending on what you enjoy doing, this could be a serious consideration.

Along with your goals, you should also be thinking about the 7 Risks of Retirement Planning.

Empirically, your replacement ratio is inversely related to your pre-retirement income. The higher your income before retirement, the lower your replacement ratio. Social Security serves as the counterbalance, covering a larger proportion of post-retirement income for those who made less pre-retirement. This makes sense, as people with higher paying jobs had proportionally more of their income going to retirement, job-related expenses and taxes before retirement, rather than necessities.

Marlena Lee at Dimensional Fund Advisors found median replacement ratios by income level:

Don’t take these numbers as absolute truth, but they should put you in about the right ballpark of how much income you want in retirement. Take a serious look at your financial situation and your desired lifestyle to determine a realistic spending rate in retirement. If you want to spend a month traveling every year, you’ll want to budget for a larger replacement ratio than if your big annual trip is a long weekend at a local bed and breakfast.

Replacement ratios provide a great way to start thinking about how much income you’ll need in retirement, but they are only the beginning of the story. Your needs will almost certainly vary in retirement – you may want to help pay for your grandchildren’s education, you could have health issues, or any number of things could happen.

Do this: Make a list with two columns — on one side, list things you want to accomplish in retirement; on the other, list things you are afraid of in retirement. These can give you some idea of what you need to be prepared for in retirement. That list combined with your replacement ratio will put you on the path to building a solid financial plan.

And to fond out how to make the markets your ally in putting this plan into action, learn about the 12 Principles of Intelligent Investors.

Leave a Comment