Contact and feedback
This site is a calculation tool, so accuracy is the whole product. If something looks wrong, telling us is genuinely useful.
- Projected balance (at retirement)
- $1,846,072
- Investment growth
- $1,366,123
Report a calculation error
Tell us the inputs you used and the figure you expected. We check against the formula and publish a correction if the tool is wrong.
Suggest a question or topic
If a 401k question is not covered on the FAQ hub or in a guide, send it over. Gaps in coverage are the most useful feedback we get.
Translation feedback
Financial terms are easy to get subtly wrong across languages. If a translation reads oddly to a native speaker, we want to hear about it.
We cannot give financial, tax or investment advice, and we cannot tell you how to invest or what your plan's exact rules are. For those questions, speak with a qualified professional and confirm details with your plan administrator.
Keep exploring
Explore the rest of the site
- 401k CalculatorThe main retirement projection — salary, contribution, match, and your balance at retirement.
- 401k Growth CalculatorProject what your 401k will be worth at retirement — including your contributions, the employer match, and decades of compound growth.
- 401k Match CalculatorSee exactly how much free money your employer adds to your 401k — and the contribution rate you need to capture every dollar of the match.
- Roth vs Traditional 401k CalculatorCompare the after-tax retirement value of Roth and traditional 401k contributions side by side — and see which one leaves you with more.
- Guides (15)Long-form explanations of how 401(k)s work, compared against the alternatives.
- 401k glossaryEvery term defined, with the rule or formula attached wherever one applies.
- FAQ hubDirect answers to the questions people actually ask about 401(k)s.
- Methodology & accuracyEvery formula, assumption and source behind the published figures.
- Full sitemapEvery page on the site in one index, plus the XML sitemap.