My Business Math
Free tools for small business owners

Run your business with clearer numbers.

Calculators, trackers and a simple accounting workspace for owners and sole proprietors. All free. Try one now, then log in to keep your records.

Log in and start Try a calculator
  • Free to use
  • Calculators work without an account
  • Your records stay yours
30Calculators
15Trackers
1Workspace
$0Cost to you
What’s inside

Three tools. One simple home.

Use any of them on its own, or all three together. Each one is built for owners, not accountants.

Calculators

Taxes, pricing, loans and break-even. Get a clear answer in a couple of minutes, no account needed.

  • Self-employed tax
  • What should I charge?
  • Cash runway
Browse 30 calculators

Track & organize

Time, invoices, miles and deadlines. Small logs that keep the everyday stuff from slipping.

  • Time & billable hours
  • Invoices & payments
  • Mileage log
Open 15 trackers

Workspace

A simple place for your books: money in and out, bank imports, invoices and reports.

  • Guided setup
  • Bank & card import
  • Profit & Loss
Log in to your workspace
A good place to start

Calculators

See all 30
TaxWhat estimated tax do I pay next?Self-employed taxYour next federal and Minnesota payment, the penalty-safe amount, what to set aside and every 2026 due date.BusinessWhat should I charge per hour?What should I charge?The hourly rate that covers the pay you want, your business costs and the hours you can’t bill.DeductionsHow much can I deduct for driving?Business mileageYour 2026 deduction for business, medical and charity miles, or for your actual vehicle costs.BusinessHow much do I need to sell?Break-even pointThe sales, jobs or hours you need to cover every cost, and the dollars that brings in.DeductionsCan I deduct my home office?Home-office deductionYour home-office deduction figured both ways, simplified and actual cost, and which one saves more.TaxShould I become an S-Corp?S-Corp comparisonWhether an S-Corp saves you tax after a reasonable salary, payroll taxes and extra costs.

Track & organize

See all 15
WorkHow many billable hours did I work?Time & billable hours trackerYour hours by client or project, what they’re worth, and what you haven’t billed yet.MoneyWho still owes me money?Invoice & payment trackerEvery invoice in one list, with what’s paid, partly paid, overdue and still owed to you.Tax & recordsHow many business miles have I driven?Mileage trackerEvery business drive with date, place and purpose, and your total business miles for tax time.MoneyWhere did my money go this month?Income & expense trackerYour money in, money out and what’s left, with every entry sorted by category.MoneyWhat do I need to pay, and when?Bills & subscriptions trackerUpcoming bills and subscriptions with due dates and what’s still to pay, so nothing is late.OperationsWhat’s due next for my business?Business deadline trackerTax filings, renewals and other business due dates, with overdue and upcoming items up top.
How it works

Up and running in three steps

  1. 1

    Pick a tool

    Start with the question on your mind: a calculator for an answer, a tracker for a habit.

  2. 2

    Log in

    One click saves your work, so your entries are there next time you come back.

  3. 3

    Keep it in one place

    Calculators, trackers and your books live side by side in your own workspace.

The workspace

Your books, without the bookkeeping headache.

When you are ready for more than one tool, the workspace keeps everything together. It walks you through setup and does the sorting for you.

  • Guided setupAnswer a few questions about your business and get a chart of accounts that fits.
  • Bank and card importBring in statements, review each line once, and match transfers between accounts.
  • Reports you can readProfit & Loss, balance sheet and cash flow in plain language.
Log in to your workspace See a sample workspace
Want a second opinion?

Connect with an expert

Questions about taxes, bookkeeping, payroll or setting up your business? Send a short note and a real person will get back to you.

Send a question

Your numbers, all in one place.

Log in, pick your first tool and start keeping track today.

Log in and start Or browse the trackers