I once watched a freelancer celebrate a $20,000 contract and budget a $20,000 lifestyle around it. After the platform fee, subcontractor costs, and taxes, the contract kept about $11,000. Gross-versus-net confusion isn’t a beginner quirk, it’s the most expensive misunderstanding in self-employment, and it compounds every time you quote, spend, or save off the wrong number.
Definitions that matter: gross is the invoiced total, the headline. Net is gross minus discounts, business expenses, and platform or processing fees. Income and self-employment taxes apply to net only. Sales tax collected is neither: it’s pass-through money that was never income and never a cost, and letting it pollute either figure corrupts every downstream number.
Worked example: $10,000 gross, $800 subcontractor, $300 processing fees, $1,200 in other costs → $7,700 net. At typical rates that’s roughly $1,085 SE tax plus ~$1,200–$1,500 income tax, leaving about $5,100–$5,400 of true keep. The headline said ten thousand; reality kept about half. Nobody who runs this math once ever quotes the same way again.
My operating habit: every quote gets a two-line internal note, gross and estimated net-after-tax-keep, before I decide whether the project is worth the calendar space. Clients see gross; I decide on keep. And savings percentages always apply to net: 30{e0bed9560a59d6d3feee569f5ae3dad3ee14a646b3fccc2d16becbf099999e03} of $7,700, never 30{e0bed9560a59d6d3feee569f5ae3dad3ee14a646b3fccc2d16becbf099999e03} of $10,000.
Takeaway: gross is vanity, net is taxable, keep is decidable, run all three before committing.
Try it live: Invoice Tax Breakdown Calculator, run your own numbers in seconds.
How do you use Invoice Tax Breakdown Calculator?
Open the Invoice Tax Breakdown Calculator in your browser (Split any invoice into subtotal, tax, and total, per line item). Type or paste your input, adjust the options, and copy the result. Everything runs locally on your device with no account and nothing stored, so the three steps below take seconds even for confidential work.
- Enter your numbers into the fields. The result recalculates as you type.
- Switch any unit or option to see the updated answer instantly.
- Copy the result with the copy button, or read the summary beneath it.
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