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Set your growth and inflation rates

“How do I change the return and inflation assumptions in my retirement projection?”

Pro
How-to
3 min
Verified · Sep 23, 2026

Two numbers drive most of your retirement projection: how fast your savings grow and how fast your costs rise. You set both in the Rates & Contributions card on the Retirement page. Change either one and the projection updates to match.

Before you start

  • Retirement planning is a Pro feature.
  • You need permission to update retirement settings.

Steps

  1. Go to Retirement (opens in a new tab) and open the Rates & Contributions settings card.
  2. Enter your expected yearly return in How much your investments grow each year (0% to 15%). Hover the info icon to see typical ranges for reference.
  3. Enter your expected yearly rise in living costs in How fast prices rise each year (0% to 10%).
  4. If you have an HSA, enter what you expect to spend from it each year on medical costs in Medical bills paid from your health savings account (HSA) each year.
  5. Changes save automatically. Check the chart to see the new projection.

How the projection handles it

  • How much your investments grow each year grows your retirement investments each month at that yearly rate. If an account has its own interest rate set (for example, a savings account's interest rate, APY), that account uses its own rate instead.
  • How fast prices rise each year raises your bills every month at that yearly rate. Loan payments (mortgage, auto, RV/boat, other loans), credit card payments, and life and disability insurance premiums stay flat, since those amounts are fixed by contract.
  • Property tax bills rise at your home appreciation rate instead when real estate tracking is on.
  • Extra spending money can also grow at this inflation rate if you turn that option on.
  • Medical bills paid from your health savings account (HSA) each year is subtracted from your HSA each year until your retirement age or age 65.

Good to know

  • One steady rate, not market swings. The standard projection uses the same growth rate every year. To see a range of outcomes with ups and downs, switch to Monte Carlo mode. See Run a Monte Carlo simulation.
  • Small changes add up. A one-point change in either rate compounds over decades, so it can move your result a lot. Trying a few values shows how sensitive your plan is.
  • The ranges in the tooltips are general reference only, not a recommendation for your plan.
  • Guided setup asks about growth and prices in plain language too — see Set up your retirement plan with guided setup.

FAQ

Does How much your investments grow each year apply to every account?

It applies to your retirement investments by default. An account with its own interest rate set, such as your savings account's interest rate (APY), grows at that rate instead.

Do all of my bills rise with inflation?

Most do. Loan payments, credit card payments, and life and disability insurance premiums stay fixed, since those amounts are set by contract.

What range can I enter?

How much your investments grow each year accepts 0% to 15%. How fast prices rise each year accepts 0% to 10%.

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Beyond Payday is a planning tool, not a financial advisor. Help articles are educational — projections and examples are estimates based on the numbers you enter, not financial, tax, or investment advice.