TaxFlow Pro US

About TaxFlow Pro US

Being self-employed in the US means navigating federal income tax, self-employment tax (SECA), quarterly estimated payments, and a maze of deductions — all on your own. TaxFlow Pro US brings it all together in one clean, offline app that calculates your complete federal tax picture in seconds.

Enter your freelance income, business expenses, and deductions. The app shows you your net profit, adjusted gross income, taxable income, every tax bracket hit, SE tax, QBI deduction, and exactly what to send the IRS each quarter — with an accountant-ready PDF report when you're done.

What it calculates

• Self-employment tax (SECA) — 15.3% SS + Medicare, correctly phased against W-2 wages
• Federal income tax across all 7 brackets for your filing status
• QBI deduction (20% of qualified business income) with eligibility toggle
• Quarterly estimated payment schedule — Q1–Q4 dates and amounts
• Safe harbor calculation to avoid IRS underpayment penalties
• Home office deduction — simplified ($5/sqft) or actual expenses method
• IRS standard mileage deduction ($0.70/mile for 2025, $0.67 for 2024)
• Above-the-line deductions: health insurance, SEP-IRA/Solo 401(k), student loan interest
• Qualified dividend tax at preferential 0%/15%/20% rates (stacked correctly)
• Additional Medicare tax (0.9%) for high earners
• All four filing statuses: Single, Married Filing Jointly, Head of Household, MFS
• Editable rates panel for future years or manual overrides

The accountant report

One click generates a print-ready summary covering your full income breakdown, Schedule C expenses, SE tax (Schedule SE), AGI calculation, taxable income, all deductions, and quarterly payment schedule. Take it straight to your CPA or use it for your own records.

Like all Nexior Gray products, TaxFlow Pro US is a single HTML file — open it in any browser and it works immediately, offline, with no installation, no account, and no subscription. Your data is saved locally in your browser between sessions.

For federal estimation purposes only. State and local taxes are not included. Does not account for AMT, passive activity rules, or net investment income tax (3.8%). Always verify your final figures with a qualified CPA or enrolled agent before filing.