It’s common to discuss desired annual retirement income as a percentage of your current income. Depending on who you’re talking to, that percentage could be anywhere from 60 to 90 percent, or even more.
The appeal of this approach lies in its simplicity, and the fact that there’s a fairly common-sense analysis underlying it: Your current income sustains your present lifestyle, so taking that income and reducing it by a specific percentage to reflect the fact that there will be certain expenses you’ll no longer be liable for (e.g., payroll taxes) will, theoretically, allow you to sustain your current lifestyle.
The problem with this approach is that it doesn’t account for your specific situation. If you intend to travel extensively in retirement, for example, you might easily need 100 percent (or more) of your current income to get by. It’s fine to use a percentage of your current income as a benchmark, but it’s worth going through all of your current expenses in detail, and really thinking about how those expenses will change over time as you transition into retirement.