Launched this week
US Tax Calculator 2026
2026 US tax calculator: federal, state & self-employment
17 followers
2026 US tax calculator: federal, state & self-employment
17 followers
Free trilingual (EN/ZH/ES) tax calculator covering US federal + all 50 states. New: compare 2025/2026/2027 side by side, save scenarios like W-2 vs freelance to compare line by line, and a self-monitoring freshness alert warns you if the data ever goes stale. Accurate SE tax and short/long-term capital gains. No signup. Interactive step-by-step tutorials, 21 original guides, and FAQ.
@andrew_zhang8 I can appreciate the amount of work that goes into keeping tax calculations accurate across all 50 states, so I was happy to give your product an upvote. Building it without requiring signups is a nice touch, and I'm interested to know how you're keeping federal and state tax rules updated as regulations change each year.
@spotch_founder Thanks Nick, really appreciate the upvote! Great question ！
We only build from primary sources, never third-party summary tables: federal figures come straight from the IRS's annual Revenue Procedure (Rev. Proc. 2024-40 for 2025, Rev. Proc. 2025-32 for 2026) and from the text of legislation itself, like the OBBBA changes; state rates and rules come from each state's own Department of Revenue; the Social Security wage base comes from the SSA's yearly announcement.
On timing: every October–November, once the IRS publishes next year's Rev. Proc. and the SSA announces the new wage base, we swap our projected figures for the official ones within days — that's exactly what will happen to our 2027 numbers this October. States get re-verified one by one in December–January as they finalize next year's rates, major legislation is folded in within days of signing, and we run a full audit of the entire data set every quarter as a backstop.
We also just shipped something that goes a step further than policy: the calculator now watches its own data. If we're inside an annual update window and haven't refreshed yet, a small heads-up appears near the calculator; if that window closes and we still haven't updated, it turns into a clear warning telling people to hold off and wait for us to catch up — tracked independently for federal rules and for all 50 states plus DC. So you don't have to just take our word for it.
The whole process, plus exactly where each state and the federal numbers currently stand, is now up as an FAQ on the site too. Thanks again for digging into the 50-state work and for trying it out!
Adding the ability to compare two tax years side by side would be really useful, especially for freelancers trying to decide whether to bunch deductions into 2026 or push them to 2027.
@alparsland64069 Great suggestion! Year-over-year comparison would definitely help with deduction timing decisions. We'll add it to the roadmap.
One thing that would really help is letting users save scenarios to compare side by side, like a W-2 job vs full freelance income. That way I can see the tax impact before making a big decision about going self-employed, instead of running the numbers manually in two browser tabs.
@kaanfeqa Thanks for the suggestion — scenario save and side-by-side comparison is now live! You can save multiple scenarios (W-2 vs freelance, different deduction strategies, etc.) and compare them instantly without juggling browser tabs. There's also a step-by-step walkthrough in the tutorial if you want a guided tour. Hope it helps with your decision!
Finally a tax calculator that covers all 50 states in one place instead of hunting down separate tools. The bilingual toggle is a nice touch, and the breakdown of self-employment tax actually shows where the numbers come from.
@esiladindoruk Thanks! Having all 50 states in one place plus bilingual support was the core mission from day one. Glad the self-employment tax breakdown is working well for you — we built it specifically because most calculators hide the math.
A "compare years" view would be super useful, like a side-by-side of 2025 vs 2026 tax projections so I can see how the new brackets and credits actually change my refund. Would help a lot when deciding whether to adjust withholding mid-year.
@glseren314996 Thanks for the suggestion — the "compare years" view is now live! You can run side-by-side projections for 2025 vs 2026, and we've also added 2025 vs 2026 vs 2027 so you can see how the new brackets and credits affect your refund across multiple years at once. There's a step-by-step walkthrough in the tutorial if you want a guided tour. Should make mid-year withholding adjustments a lot easier to evaluate.
Switched over to Advanced mode and noticed the capital gains breakdown actually separates short-term vs long-term properly, which is something most free calculators get wrong. Genuinely useful for freelancers like me.
@ahin271454 Thanks for the feedback! Glad the capital gains breakdown is helpful for your freelance work. Let us know if you spot anything else we can improve.
Honestly pretty useful that it handles both federal and all 50 states in one place, and the self-employment tax breakdown actually shows me where the numbers come from.
@glhaneb63 Thanks! Federal + all 50 states in one place plus a clear self-employment tax breakdown was exactly what we were going for. Let us know if there's any other breakdown you'd like to see.