United States / Tools
Calculators on public formulas, nothing more
Each tool computes a published statutory schedule: the mechanics a regulator prints, with the figures dated and the math self-tested. Where a number would need licensed judgement, the tool says so and stops rather than guessing.
| Free | No sign-up, no email wall. 9 tools on this market. |
|---|---|
| Sourced | Every figure carries the statute or schedule it came from, and the date we read it. |
| Bounded | Deadlines, fees and penalties. Never a liability, and never a legal determination. |
- IRS late-filing & late-payment penalty calculator
Two clocks run at once and they do not simply add up. The §6651 mechanics: 5% a month to file, 0.5% a month to pay, both capped at 25%. Interest sits on top and is not modelled here.
- Delaware franchise tax calculator (both methods)
The notice Delaware sends uses the method that produces the largest number. Run both and see what the Assumed Par Value calculation does to it. For a lot of startups the difference is four figures.
- Annual report deadlines & fees by state
What each state wants from an LLC or a corporation, when it is due, and what it costs. All 51 jurisdictions, every row linked to the state’s own page and dated.
- Payroll tax calculator — employer and employee
What a wage actually costs once Social Security, Medicare and FUTA sit on top of it. The employer side and the employee side are different numbers, and this shows both.
- Payroll deposit schedule — monthly or semiweekly?
One lookback figure decides whether you deposit monthly or semiweekly. Get it wrong in the late direction and penalties start at 2% and climb to 15%.
- Estimated tax safe-harbour calculator
The safe harbour is a published rule, not a forecast. Hit it and the underpayment penalty cannot reach you, whatever the year turns out to look like.
- Do I need to file a 1099-NEC?
The reporting threshold moved from $600 to $2,000 and most guidance online still has not caught up. Check a payment here before you file anything.
- 1099 vs W-2 — the payroll tax difference
The same money, received two ways. The gap is self-employment tax against employee FICA, plus the employer half that never appears on a payslip.
- Compare state compliance costs
Three states side by side for one entity type, drawn from the verified 50-state dataset. Published fees only. It ranks nothing, because where to incorporate is not a cheapest-fee question.