Python scripts
2026 Form 1040 & Schedule C Estimator: Python Script for Self-Employment Tax and Quarterly Payments
Type in revenue and expenses and see profit, self-employment tax, taxable income, federal tax and what to pay each quarter, from a script you run locally with no subscription.
$39 one time · example and blank copies · download link by email
Who it is for
Freelancers, sole proprietors and single-member LLC owners who want a quick, private planning estimate, and bookkeepers who prepare estimates for clients.
Why it is different
- Every 2026 figure sits in one data file with its official source named, so you can check it and update it next year.
- Runs locally on Python's standard library: your numbers never leave your computer.
- Says what it leaves out (capital gains, credits, phase-outs, other states) instead of hiding it.
What is inside
- The script. One command line tool: status, revenue, expenses, W-2 wages, withholding, credits, prior-year tax and an optional NJ estimate.
- 2026 data file. Brackets, standard deduction, Social Security wage base, QBI threshold and NJ tables in one JSON file, each with its source.
- Quarterly schedule. The four estimated payments with their due dates and the safe-harbor logic shown.
- Example input. A made-up example you can copy and change.
Get it
2026 Form 1040 & Schedule C Estimator (Python)
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Delivered as a zip of Python scripts with sample files. Needs Python 3.8 or newer. A planning estimate, not tax software, and not tax, legal or accounting advice. Figures come from IRS Rev. Proc. 2025-32, the Social Security Administration and the NJ Division of Taxation; check them before relying on a result. No result is promised. Payment is handled by Stripe. If a file will not open or something looks wrong, reply to your order email and we will make it right.
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