
US Tax Calculator 2026
National Tax Tools
SmartCalcLabs
401k Calculator
401kCalculator.info
Free-Calculator.org
paycheckengine
Free HSA, IRA, and 401(k) calculators for contribution limits, eligibility, and excess-contribution penalties โ verified against IRS Revenue Procedures. No login required, nothing stored; every calculation runs entirely in your browser.

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Website, pricing, platforms and company facts side by side.
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| Website | verifiedlimits.com | reactionic.github.io |
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| Company | Startup from Bulgaria ยท 1 - 9 employees ยท 2026 | โ |
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In their own words, as submitted to SaaSHub.


Ledger&Leaf is built for one job: getting IRS contribution limits, eligibility rules, and penalty math exactly right for HSAs, IRAs, and 401(k)s โ nothing else competing for your attention. Twelve calculators, each verified directly against primary IRS sources (Rev. Proc. 2025-19, Rev. Proc....
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What each product offers, as listed by its team.


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As answered by people managing VerifiedLimits and React-Ionic.
VerifiedLimits's answer
Most calculator sites treat HSA and 401(k) limits as one generic feature buried in a catalog of unrelated tools. Ledger&Leaf does the opposite: twelve calculators, one category โ US tax-advantaged account thresholds โ each verified directly against IRS Revenue Procedures and Notices, not estimated.
It also covers what generic calculators skip entirely:
No login, no account, no data stored โ every number is calculated in your browser and nowhere else.
VerifiedLimits's answer
Getting a contribution limit wrong costs real money โ a 6% excise tax on excess HSA or IRA contributions, a missed employer match, a blown catch-up window.
VerifiedLimits's answer
US taxpayers actively managing an HSA, IRA, or 401(k) who want a precise answer, not a rough estimate โ DIY investors from communities like Bogleheads and r/financialindependence, and people navigating a specific edge case: a job change mid-year, a shift in HDHP coverage, or catch-up eligibility that simpler calculators don't model.
VerifiedLimits's answer
Ledger&Leaf started from a simple observation: the numbers that actually decide whether an HSA or 401(k) contribution is safe โ prorated limits, catch-up thresholds, mid-year coverage changes โ are scattered across dense IRS documents that most calculators simplify past the point of being reliable.
It's built and maintained by a solo founder, one calculator at a time, verifying every figure against the primary source before it ships. The goal isn't to be another all-purpose finance hub โ it's to be the place people go when this specific answer needs to be right.
VerifiedLimits's answer
A client-side single-page application, entirely browser-based:
No backend, no database โ every calculation runs client-side, which is also why no login or account is ever required.
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