Quartly Support

1099 quarterly tax & deduction estimator for iPhone

Estimates only — not tax advice. Quartly estimates federal self-employment and income tax using the 2026 IRS tables, plus simplified California and New York estimates. Verify with the IRS, your state agency or a tax professional before paying.

Contact

Email angel_llano@icloud.com. We reply within two business days.

How Quartly works

  1. Log income — every 1099 / freelance / gig payment, in the Income tab.
  2. Log expenses — pick a category, optionally scan the receipt (on-device OCR fills amount, date and vendor). Business meals count at 50%.
  3. Track miles — type a trip or use the foreground trip timer. The IRS standard mileage rate is applied by trip date (72.5¢ Jan–Jun 2026, 76¢ from July 1).
  4. Estimate — set your filing status, state, any W-2 wages and last year's tax, then tap Calculate. Quartly shows self-employment tax (12.4% Social Security to the $184,500 wage base, 2.9% Medicare, 0.9% Additional Medicare over the threshold), the ½-SE-tax deduction, the standard deduction, the 20% QBI deduction, federal income tax, the safe-harbor target (90% of this year or 100%/110% of last year) and the four IRS due dates.

Quartly Pro

Your first full estimate is free. Quartly Pro unlocks unlimited estimates, the safe-harbor plan and the payment schedule, either as a $39.99/year subscription (auto-renews; cancel any time in Settings › Apple Account › Subscriptions) or a $79.99 one-time lifetime purchase. Use Restore Purchases in Settings or on the paywall to restore on another device signed in to the same Apple Account.

Frequently asked

Why "project to full year"? Estimated tax is based on your expected full-year income. Quartly scales your year-to-date figures by the fraction of the year elapsed; turn it off to use the figures as entered.

Does Quartly file or pay anything? No. Pay the IRS at irs.gov/payments (Form 1040-ES) and your state through its own portal.

What is not modeled? Credits, AMT, net investment income tax, capital-gains rates, dependents, state credits, NYC/Yonkers tax, MCTMT and the NY recapture above $107,650. California uses the 2025 FTB tables as the 2026 Form 540-ES directs.

Where is my data? Only on your iPhone. Delete the app to remove it. See the Privacy Policy.

Tax-year constants

Federal: Rev. Proc. 2025-32 and the 2026 Form 1040-ES. Social Security wage base: SSA 2026 fact sheet. Mileage: IRS Notice 2026-10 and Announcement 2026-11. California: FTB 2025 rate schedules via the 2026 Form 540-ES instructions. New York: Form IT-2105-I (2026).