Free calculators and quick helpers for taxes, filing deadlines, startup costs, loans, and professional email. Built for small business owners who want plain-English answers and less spreadsheet guesswork.
Sales Tax Calculator
State and local rates for all 50 states and major cities.
- All states
- City rates where applicable
Annual Report Due Dates
When LLC and corporation periodic reports are typically due, by state.
- 50 states
- LLC and corporation
Self-Employment Tax Calculator
Estimate Social Security and Medicare tax, deduction amount, and quarterly set-aside.
- Schedule C friendly
- Quarterly estimate
Registered Agent Requirements
Per-state rules and DIY vs registered-agent costs.
- State requirements
- Cost snapshot
Business Formation Calculator
LLC and corporation filing and annual cost estimates by state.
- 50 states
- LLC and corp
Email Signature Generator
HTML signature with logo and contact fields, copy-paste ready.
- Gmail / Outlook
- Logo support
Lending Calculator
Payments, interest, and amortization for loans and lines.
- Payment schedule
- Rate scenarios
Break-Even Analysis Calculator
Find units or revenue needed to cover fixed costs and estimate months to profitability.
- Units and revenue
- Profitability estimate
Chrome Extension
Open state SOS and UCC portals from the browser toolbar.
- One-click states
- SOS and UCC