The 12% controversy
Ramsey teaches that 'good growth stock mutual funds' return 12% on average, based on the long-term S&P 500 nominal return before fees. Most fee-only advisors call this optimistic — using 8–10% is more defensible when planning. Both numbers are shown so you can see the swing.
Why compounding is not linear
The first 10 years feel slow. The last 10 years produce most of the balance. Skipping 5 years of contributions early is far more expensive than skipping 5 years later, because those early dollars have the most time to compound.
- • $500/mo × 30 yrs @ 10% = ~$1.13M
- • $500/mo × 25 yrs @ 10% = ~$663K (starting 5 yrs later loses ~$470K)
- • $500/mo × 35 yrs @ 10% = ~$1.9M (starting 5 yrs earlier gains ~$770K)
Baby Step 4 math
Ramsey's Baby Step 4 is 'invest 15% of household income for retirement.' On a $60K income, that's $750/month. Over 30 years at 12%, that's about $2.6M; at 8%, about $1.1M. The 4% withdrawal rule then supports ~$3,700–$8,700/mo of retirement income.
FAQ
Is 12% return realistic?
Historically the S&P 500 has averaged ~10% nominal (before inflation) over 100+ years. Ramsey uses 12% based on gross returns of certain growth stock mutual funds. Most planners use 7–10% to build in a margin of safety.
What is Baby Step 4?
Dave Ramsey's fourth Baby Step: invest 15% of your gross household income into tax-advantaged retirement accounts (401(k), Roth IRA).
Should I use 12% or 8%?
For motivation, 12% is compelling. For planning, run both numbers — if your goal only works at 12%, it's fragile. If it works at 8%, you have margin.
What's the 4% rule?
You can safely withdraw about 4% of your portfolio each year in retirement without running out over 30 years. On $1M, that's $40K/yr or ~$3,333/mo.
Roth IRA or 401(k) first?
Ramsey's order: 401(k) up to the employer match, then max Roth IRA ($7,000 in 2026), then back to 401(k) to hit 15% total.
Does the calculator account for taxes?
No — this is pre-tax growth. Roth IRA balances are tax-free at withdrawal; 401(k)/Traditional IRA are taxed as ordinary income. Assume ~15–25% haircut for traditional accounts.
How much should I have saved by age 40?
A common benchmark is 3× your annual salary by 40. Ramsey doesn't publish age targets — he focuses on the 15% habit regardless of current balance.
What if the market crashes right before I retire?
This is 'sequence of returns risk.' Solutions: hold 1–2 years of cash, glide-path into bonds in your 60s, or use a variable withdrawal strategy instead of a flat 4%.
How this calculator is built
Independently maintained
Written by Sam Doshi and the RevenueLab editorial team. We don't sell the data feeds this tool is built on.
Sourced from primary data
Benchmarks come from public AdSense / Stripe / IRS disclosures and reader-submitted data — never third-party "$X per view" claims. Full methodology.
Last reviewed
July 2026. We re-check every figure on the platform on a rolling quarterly cycle.
Editorial standards
See our editorial policy and disclaimer. Results are estimates, not advice.