19 Calculators for People Who Invoice for a Living.
Freelancers, contractors and solo consultants.

Salaried finance calculators assume a predictable monthly paycheck. Yours does not. These tools start where the invoice starts: what to charge, how much to set aside for tax, whether that project is actually worth taking, and how many months you can coast if a client goes quiet. Every tool runs entirely client-side — your numbers never leave this page.

No accounts No analytics cookies Open methodology Mobile-first

These calculators assume an irregular paycheck

Built for "what if", not just "what is"

Most calculators answer one number. Ours let you flip a side condition — drop a client, extend a deadline, raise your rate, change the tax bracket — and watch the answer move in real time.

Visual output, not a single number

Every tool renders a chart or table so you can see the shape of the answer — when the tax bill lands, where the balance decays, how many months of runway you actually have.

Honest about limits

Each tool lists what it doesn't do, what assumptions it makes, and when you should talk to a human — an accountant, a lawyer, or your client. We do not hide the math behind marketing copy.

Who this is for

If your income arrives as invoices rather than payroll, the standard personal-finance calculator answers the wrong question. It divides a steady monthly salary into neat buckets; you need to know what to charge this month, what to set aside for the tax bill in April, how long a runway of three months of quiet actually buys you, and whether a $4,000 project is worth the 60 hours it will take.

The four freelancer-first tools here were built for that. The other fifteen are the same calculators a salaried person would reach for — compound interest, emergency fund, loan amortization, net worth, retirement — with a note on each page explaining how the assumptions change when the paycheck does not.

We are not accountants, lawyers or financial advisers, and nothing here is advice. These tools show you the arithmetic; the judgement call stays yours.

All 19 tools

The first four are freelancer-specific. The rest are the everyday money tools, with a freelance angle on each page. Every page is self-contained and works offline once loaded.

Loan Amortization

Schedule + extra-payment simulator + total-interest comparison.

Compound Interest

Inflation-adjusted real return + tax drag + contribution cadence.

Retirement Planner

Gap analysis with lifestyle tiering and social-security offset.

Crypto P&L

FIFO / LIFO / HIFO cost basis, fee modeling, short/long-term split.

Salary Converter

Hourly / monthly / annual / daily, 12 currencies, gross↔net.

ROI / ROIC

Total return with opportunity cost, hold period, annualized IRR.

Depreciation

Straight-line, double-declining, sum-of-years; tax-shield view.

Home Affordability

PITI + HOA + PMI trigger; "28/36" stress test; commute cost.

Credit Card Payoff

Avalanche vs snowball, minimum-payment trap, multi-card.

Emergency Fund

Months-of-runway sized to industry risk + dual-income haircut.

Inflation Adjustment

Past→present and present→future value, 30+ economies.

Currency Converter

Mid-market rate + bank/wire fee slippage, 12 majors.

Education Savings

Tuition-inflation projection + scholarship + in-state vs out.

Net Worth Tracker

Asset/liability breakdown, debt-to-asset, trend projection.

Budget Planner

50/30/20, zero-based, envelope — all three side by side.

What to Charge as a Freelancer

Target income, utilisation and tax buffer turned into the minimum rate you can say out loud.

Quarterly Tax Estimator

Federal brackets, self-employment tax and a payment schedule you can actually set aside for.

Project Cost & Quote Estimator

Direct cost, overhead, revisions and scope-creep buffer priced into one fixed quote.

Buy vs Rent Your Gear

Annualised cost of ownership against the rental rate, with the break-even day count.

About FinCalc Hub

FinCalc Hub is a small editorial project built by people who wanted a finance calculator that didn't feel like a sales funnel. Every tool runs entirely in your browser — there is no server, no account, and nothing you type is sent anywhere.

Who it's for. People doing a quick sanity check on a money decision: should I refinance, am I saving enough, how much house can I actually afford, what does a side hustle really net after tax.

What it's not. Not a tax advisor, not a financial planner, not a substitute for a credentialed professional. The math is the math; the judgment is yours.

How we work. Tools are written from first principles with the formulas shown. Rates, brackets, and CPI data are taken from publicly published government sources and updated periodically. Sources are linked inside each tool. If a number looks wrong, it probably is — please tell us.

Privacy Policy

No personal data collection. FinCalc Hub does not require an account, does not ask for your name or email, and does not log the numbers you enter into any calculator. All calculations happen locally in your browser via JavaScript.

Cookies. We do not set first-party analytics or advertising cookies. We do not use any tracking pixels, fingerprinting, or session-recording scripts.

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Disclaimer

The content and tools on FinCalc Hub are provided for general informational and educational purposes only. They do not constitute financial, tax, legal, or investment advice, and are not a substitute for consultation with a qualified professional who is aware of your full circumstances.

While we make a reasonable effort to keep tax brackets, interest rates, and inflation data current, official figures change and we cannot guarantee zero error. Always cross-check against the primary government source linked inside each tool before acting on a number.

Any projections (retirement balances, loan payoffs, investment growth) assume a steady rate or return that does not reflect market volatility, sequence-of-returns risk, regulatory change, or personal life events. Real outcomes will differ, sometimes substantially.

Affiliate links, if any, are clearly marked. Their presence never affects the math shown by a tool.

Editorial Team

FinCalc Hub is maintained by a small independent editorial team with backgrounds in personal finance, software engineering, and applied mathematics. We are not a financial institution, brokerage, or advisory firm.

How we work. Each tool is reviewed before publication. Default values are chosen to be representative, not promotional. When government data is the source, the link is shown. When a tool is a simplification of a real-world model, the limit is named in the “Methodology” section of the page.

Corrections. If you find a number that looks wrong, tell us. We log every correction with the date and source. Substantive corrections are noted in the page footer.

Contact

This domain does not currently run a mail server, so we do not publish a contact address — an address that silently bounces is worse than no address at all. Corrections and tool suggestions still get taken seriously: every one of them is logged with the date and the source, and substantive corrections are noted in the footer of the tool page where they happened.

Bugs & calculation errors — fixed, dated, and attributed to a source.
Content & tool suggestions — we add tools that a real question keeps producing, not that a keyword list suggests.
Privacy — we store nothing you type into a calculator. The Privacy section below spells out exactly what third parties can see.

We do not provide personalized financial advice, and we do not respond to SEO, link-exchange, or guest-post pitches.

19 Calculators for People Who Invoice for a Living. Freelancers, contractors and solo consultants.