Take the guesswork out of Washington’s newest tax proposal.
One Big Beautiful Bill Impact Calculator turns the 900-page H.R. 1 (119th Congress) into a quick, clear dollar figure, so you can see exactly how your federal taxes might change in 2025 compared with 2024.

⚡ Why you’ll love it
• Instant answers – Get results in under a second.
• 100 % offline & private – Every calculation runs on your device; we collect zero data and use no analytics SDKs.
• Side-by-side view – See 2024 vs 2025 taxes, refunds, effective rates, and the biggest driver of change.
• For every filer type – Wage earners, gig workers, and small-business owners can all model their numbers.
• Material 3 design – Clean, accessible UI with both light and dark mode.
• WCAG 2.2 AA – Built to be usable with screen readers, large text, and high-contrast settings.

🔍 What you can enter
- Filing status (Single, Married Filing Jointly, etc.)
- W-2 wages and 1099/self-employment income
- Qualified Business Income toggle
- Dependents under and over 17
- Itemized deductions or Standard deduction
- State & Local Taxes paid (SALT)
- Child-care expenses for the CDCTC

🧮 How it works
- You fill in your 2024 numbers.
- The app applies current-law brackets, credits, and deductions.
- It instantly reruns the same inputs under H.R. 1’s 2025 rules.
- You get a clear “Increase/Decrease” dollar amount, percent change, and credit breakdown.

DISCLAIMER: Neither this app nor the developers are affiliated with any government in any capacity. The calculations are performed using publicly available tables and data. See https://www.congress.gov/bill/119th-congress/house-bill/1/text

All tax logic is coded directly from IRS Rev. Proc. 2023-34 (2024 tables) and the exact bill text (§§ 70101 – 70105). A 200-scenario test suite ensures 100 % calculation accuracy.

🛡️ Your privacy, guaranteed
- No sign-up, no cloud.
- Data never leaves your phone.

🚀 Roadmap (free updates)
- Save & compare multiple scenarios
- Spanish localization
- Withholding optimizer and pay-stub planner

This app provides estimates based on the bill’s current language and may change if the legislation changes or the IRS issues new guidance. It is not tax or legal advice. Always consult a qualified professional for your specific situation.