Small-business finance toolkit
Practical finance, tax, and bookkeeping tools for people who run their own business.
Featured calculator
From cost basis to a full depreciation schedule.
Year 1 deduction
$7,145
Half-year convention · 200% declining balance
Open the MACRS calculatorEvery calculator on CalcWise
Featured calculator
Depreciation is where a lot of small-business tax decisions actually happen, and it's easy to get wrong. This calculator builds the full schedule and shows what changes when you take Section 179 or bonus depreciation.
Illustrative example. Your actual result depends on the placed-in-service date, the convention, and which elections you take. The calculator works out the full schedule.
The library
Eight groups covering the money side of a small business, from estimating taxes to pricing your work.
Estimate what you'll owe and set money aside before it's due.
Write off equipment the right way, with the full schedule shown.
Keep the books straight and price with confidence.
Pay yourself and your team correctly, down to the paycheck.
Know what's coming and how long the runway lasts.
Compare business structures and how each is taxed.
Save for retirement as your own boss, within the limits.
Understand the real cost of borrowing before you sign.
Methodology
A calculator is only as good as the work behind it. Here's how each one gets made before it goes live.
Each calculator starts from the IRS publications and official forms that actually govern the math.
I test every formula against worked examples until the output matches the source, dollar for dollar.
Each tool lays out the formula it used and the assumptions behind it, so the result isn't a mystery.
Tax rules change. Every calculator notes the tax year it uses and the last time I reviewed it.
Who's behind CalcWise
I'm Aaron Jegla, and I build and maintain CalcWise on my own. I've done the bookkeeping for my own business for several years, and I got tired of calculators that hand you a number with no way to check it. So I research each formula from the source, test it against real examples, and document the assumptions so the math is transparent instead of a black box.
I'm not a CPA, enrolled agent, attorney, or CFP; the calculators are planning estimates, not advice; for your situation, talk to a qualified professional.
Editor's picks
Good to know
Straight answers about what CalcWise is, what it isn't, and how current the numbers are.
CalcWise is a free library of finance, tax, and bookkeeping calculators for U.S. freelancers, sole proprietors, LLCs, and S-corps. Every calculator shows the formula and sources behind its result, so you can check the math instead of trusting a black box.
No. They're estimates that help you plan and understand your options. For advice about your specific situation, talk to a CPA, enrolled agent, or tax attorney.
Each calculator shows the tax year it uses and the date it was last reviewed. When rates or limits change, I update the tool and note it.
Aaron Jegla builds and maintains every CalcWise calculator on his own. He has handled the bookkeeping for his own business for several years, holds a QuickBooks Online Certified ProAdvisor credential and an Intuit Bookkeeping Certification, and is pursuing a B.S. in Finance at Southern New Hampshire University. Because he is both author and reviewer, the review is self-review, which is weaker than independent review but stronger than none, and adding an independent CPA or enrolled agent reviewer is a planned future step. He is not a CPA, enrolled agent, attorney, or CFP, and the calculators are planning estimates, not advice.
Yes. Every calculator is free and works without an account, and there's no sign-up wall.