Sources & update notes
How to read this
TaxDriverPro is a planning tool for gig drivers. We focus on the numbers that matter most for typical gig-driver returns: Schedule C net income, self-employment tax, federal income tax, and state income tax.
Privacy: the calculator runs locally in your browser. We don’t upload or store your income, miles, or tax details.
Tax year toggle (2025 vs 2026)
The tax-year picker updates federal rules (brackets, standard deduction, mileage rate, Social Security wage base) and state rules where those rules are known.
California note: FTB’s 2026 Form 540‑ES instructions direct taxpayers to use the prior-year (2025) tax tables for planning estimated tax. That’s what this app does for CA when you select 2026.
What we calculate
- Federal income tax (progressive brackets)
- Self-employment tax (Social Security + Medicare, including the wage-base cap)
- QBI deduction (common cases; simplified)
- State income tax for 15 supported states
Important limitations (production-ready disclosures)
- Local taxes are not included (for example: NYC/Yonkers, PA local earned income taxes, city wage taxes, etc.).
- Some state-specific items are not modeled (special credits, add-backs, household-specific phaseouts). We aim to be accurate for the most common gig-driver scenarios, but this is not filing software.
- This is not tax advice. If you need exact answers for a complex situation, work with a tax professional.
State coverage (15 states)
We publish state parameters in code so they are auditable. If a state changes a rate mid-year or issues new instructions, we update the app and bump the “Rates last updated” date.
Federal references
- IRS Revenue Procedure 2025-32 (2026 inflation adjustments)
- IRS standard mileage rate (2025) and IRS Notice 2026-10 (2026 mileage rate)
- SSA maximum taxable earnings (wage base)
Key state references
- California FTB — 2025 Form 540 schedules & instructions, and 2026 Form 540‑ES instructions: 2025 Form 540 instructions · 2026 Form 540-ES instructions
- North Carolina DOR — tax rate schedules: NC tax rate schedules
- Illinois DOR — income tax rate: IL income tax rates
- Arizona DOR — estimated tax booklet (rate) and standard deduction updates: 2025 Arizona 140ES booklet
- Georgia DOR — important tax updates: GA important tax updates
Update notes
- Jan 18, 2026: refreshed Sources page text, improved landing page, and finalized 2025/2026 state-model behavior (including CA 2026 handling per FTB 540-ES).
- Jan 2026: improved calculator consistency checks and print-friendly exports.