Privacy policy
The short version: the numbers you type into any calculator on this site never leave your device.
- Projected balance (at retirement)
- US$1,846,072
- Investment growth
- US$1,366,123
Calculator data
Every calculation on this site is performed in JavaScript running in your own browser. Salary, balance, contribution and any other figure you enter are held in the page's memory for as long as the tab is open and are then discarded.
These values are never transmitted to our servers, never written to a database, never logged, and never shared with third parties. There is no server-side calculation endpoint for them to be sent to.
What is stored on your device
The site stores one item in your browser's local storage: your light or dark theme preference. It contains no personal information and is removed if you clear site data.
Accounts and personal information
No account is required to use any calculator, and none is offered. We do not ask for your name, email address, phone number or financial details as a condition of using the tools.
If you email us voluntarily, we hold that correspondence only for as long as needed to respond and to act on any correction it reports.
Analytics and cookies
If aggregate, privacy-respecting analytics are used, they record page-level traffic only — which pages are visited and from where. They never capture the values entered into a calculator, and they do not build a profile of you across other sites.
No advertising cookies or third-party tracking pixels are used.
Third-party services
The site is served through a content delivery network, which necessarily processes your IP address to deliver the page, as any web host does. We do not sell, rent or share visitor data with anyone.
Your rights
Because we do not collect personal data through the calculators, there is generally nothing held about you to access, correct or erase. If you have emailed us and would like that correspondence deleted, write to us and we will remove it.
Changes and contact
If this policy changes materially, the revision date shown below will be updated. Questions about privacy can be sent to hello@401kcalculator.info.
Formulas and content last reviewed . IRS limits change each year — confirm current figures at IRS.gov and with your plan administrator.
Keep exploring
Back to the calculators
- 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.