This is an interactive web page intended to help you understand your U.S. taxes.
You're viewing the source repository; try the graph itself at https://b-k.github.io/1040.js/ .
You might use this utility to answer questions like:
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What is the overall flow from income statements to the final refund?
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If my tax situation changes, like buying a house or having a kid, how does the shape of my taxes change?
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People keep telling me that having an IRA will reduce my tax bill. By how much?
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If I had a million dollars, what would my taxes look like? What would they look like if I made it all in capital gains?
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My mom/dad/libertarian friend complains about how their taxes are overwhelmingly complicated, but I don't think they're so crazy difficult. How can I walk them through the process?
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A lawmaker has proposed changing tax law, like a flat tax or changing the mortgage interest deduction to a mortgage interest credit. How can I get an idea of what those changes would look like?
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If you have cloned a copy of the repository, you can rebuild with the version tagged
2017and do a side-to-side comparison of how taxes worked before and after the reform in December 2017.
The web page is completely standalone. All the math happens in your browser; no data is sent to any server.
If your sole interest is to "do" your taxes, you may prefer to use the Python project that uses the cell database from 1040.js to produce output that looks more like your tax form, at https://github.com/b-k/py1040 .
You can also file directly with the IRS using FFFF [ https://www.freefilefillableforms.com ]. IRS form 1040 was first developed in 1913, and largely retains the same organization as the original, and the system still declines to do certain calculations for you. It can be productive to check your math using this tax graph or py1040, then use the results to fill in the missing calculations at FFFF.
The tax graph on this form is incomplete. For example, the earned income credit calculation is in place, but if you are a member of the clergy there is a different calculation. There are some details for people making over $155,000/year (AGI) which we will handle if any of the contributors have that problem. The code is open source, and you are encouraged to add cells or logical nuances that apply to your situation; see Contributing.md for details.
- The overall flow of the 1040
- Student loan interest deduction
- Education Credits (f8863, up to 3 students)
- Earned Income Credit
- Child Tax Credit, including refundable portion
- Schedule A, itemized deductions
- Schedule E, rental/royalty income
- Alternative minimum tax (f6251, but the simpler of the two calculations)
- f8582, real estate loss carryover
Here is some information for citing this project in an academic setting:
Author = Ben Klemens
Title = 1040.js
DOI = 10.5281/zenodo.1054109
year = 2017
Because this is an unofficial release in no way officially reviewed by The U.S. Treasury, please do not list an author affiliation.