Can I change my 401(k) contribution percentage any time or only during open enrollment?

Most 401(k) plans let you change your deferral percentage at almost any time through the recordkeeper's website, not just during annual open enrollment. Changes usually take effect on the next available payroll cycle, though some plans process them monthly or quarterly, so read your plan rules.

This flexibility means you can raise your rate after a bonus or raise, or temporarily lower it during a cash crunch, then restore it later. A good habit is to bump your rate by one percentage point every time you get a raise so you never feel the pinch. If your plan offers auto-escalation, it does this automatically. Use the Retirement Planner at wealthserene.com/tools/retirement-planner to see how even a 1% annual increase compounds over a career.