A quarterly tax estimator for people who work for themselves.

Status

The public calculator and the other estimate tools are offline. Visiting this site does not run a tax calculation, save numbers, or start a review. The domain remains as a case study, not as a working service.

What it was

Quartli was a product of LNH Labs LLC for freelancers, 1099 contractors, and other self-employed earners. It estimated federal income tax and self-employment tax, turned that into a quarterly amount, and listed the regular IRS estimated-tax dates. The figures followed published IRS rules, including income-tax brackets, self-employment tax, the qualified business income deduction, and safe-harbor amounts.

People who signed in could keep a history of estimates. The product also tracked a tax reserve and included related planning tools: W-2 compared with 1099, S corporation, safe harbor, underpayment penalty, hourly rate, and itemized versus standard deduction. State guides described where a state estimated tax might also apply. A separate CPA review, prepared by Lena Hanna, CPA, covered a personalized state figure.

What shipped

• Federal quarterly estimate Income, expenses, and filing status, expressed as a quarterly amount rather than a year-end surprise.
• The tax picture around that number Self-employment tax, the qualified business income deduction, withholding, and safe harbor, shown with the estimate.
• A payment calendar The regular federal estimated-tax dates, and a reserve to set aside between them.
• Planning tools and state context Comparisons for common self-employed decisions, plus guides for state estimated tax. State liability itself was prepared by a CPA, not by a blended rate in the free tool.

Credit

Designed and built by Lena Hanna, CPA, for LNH Labs LLC. Quartli was for people whose taxes are not withheld from a paycheck. The product is shelved. This site is the portfolio record of that work.