401(k) Planning
See how today’s 401(k) choices can shape your retirement income.
401kcalc helps you model long-term outcomes with assumptions you can inspect, adjust, and compare in minutes.
- Projection to retirement age
- Inflation-aware outcomes
- Assumptions fully visible
What the calculator helps you understand
A focused planning view for key retirement questions, without dashboard noise.
Projected retirement balance
Estimate how your current balance, contributions, and return assumptions may compound through retirement age.
Employer match impact
See how your plan match changes long-term outcomes and where contribution increases create the biggest payoff.
Inflation-adjusted outcomes
Compare nominal growth with inflation-adjusted results so planning decisions stay anchored to real purchasing power.
Estimated retirement income
Translate balance projections into an annual income estimate to evaluate readiness instead of only chasing a balance target.
Built for trust and transparency
Every estimate should be explainable. The calculator and guides are designed to make assumptions visible and decisions clearer.
Transparent methodology
Formulas, assumptions, and model limitations are documented in plain language.
Read methodologyEducational by design
Outputs are planning estimates to support decisions, not personalized financial advice.
About 401kcalcReviewed guide library
Guides are built to explain practical retirement tradeoffs and connect directly to scenario modeling.
Explore guidesClear assumptions and limits
Every scenario is inspectable so you can stress-test outcomes instead of relying on a black-box score.
Open calculatorFeatured guides
Concise, reviewed explainers to support contribution strategy, tax decisions, and employer match optimization.
Employer Benefits
Reviewed March 9, 2026
401(k) Employer Match Explained
A straightforward breakdown of employer match mechanics so you can avoid leaving compensation behind.
7 min read
Read guide
Tax Strategy
Reviewed March 8, 2026
Roth vs Traditional 401(k): How to Choose
How to choose between Roth and Traditional 401(k) contributions without guesswork or tax myths.
9 min read
Read guide
401(k) Milestones
Reviewed March 4, 2026
How Much Should I Have in My 401(k) at 60?
A practical age-60 readiness review to tighten your retirement plan before distribution decisions begin.
9 min read
Read guide
Ready to run your 401(k) scenario?
Start with your current numbers, then adjust contribution rate, retirement age, and assumptions to compare outcomes clearly.