Quarterly Estimated Tax Calculator

Why quarterly tax catches Etsy sellers off-guard

The first year an Etsy shop crosses the $400 SE income threshold, most sellers learn about quarterly tax in mid-April when they get hit with a surprise tax bill plus an underpayment penalty. The IRS does not just want your tax money once a year; for self-employed income they expect quarterly payments so the government keeps a smooth cash flow.

The math is more punitive than most sellers realize. A solo seller with $40k net profit owes roughly $5,650 in SE tax (15.3% on 92.35% of that), plus federal income tax (1k-3k for someone single in the 12-22% bracket after deductions), plus state tax (zero in TX, $2k+ in CA). Total: $7k-$10k for the year. That is $1,750-$2,500 per quarter that you did not realize you owed.

The four taxes a self-employed crafter pays

1. Self-employment tax (15.3%). Social Security 12.4% on your first $176,100 of net SE income (2025), Medicare 2.9% with no cap. Applies on top of income tax. This is usually the single biggest tax bill for full-time sellers under $150k net.

2. Federal income tax. 10-37% on taxable income (after standard deduction, half- SE deduction, and QBI deduction). For a solo seller with $40k net SE: roughly $1,500-$3,000.

3. State income tax. Zero in 9 states (AK, FL, NV, NH, SD, TN, TX, WA, WY). Up to 9-10% effective in CA, OR, HI. Most states land 4-6%. The calculator uses a simplified effective rate per state.

4. Additional Medicare tax (0.9%). Only applies above $200k earnings (single) or $250k (MFJ). Most craft sellers will never hit this; if you do, congrats on the high earnings.

The QBI deduction nobody tells Etsy sellers about

Section 199A of the tax code (the QBI deduction) lets sole proprietors deduct up to 20% of their qualified business income. For a craft seller with $30k net SE, that is a $6,000 deduction against taxable income, reducing federal income tax by $720-$1,440 depending on bracket. Almost every craft seller qualifies if their household taxable income is under $197,300 single / $394,600 MFJ (2025).

Almost no Etsy seller knows about this. TurboTax and FreeTaxUSA apply it automatically when you file. But for quarterly planning you should factor it in so you do not over-pay each quarter and create a refund situation. This calculator includes QBI by default.

Worked example: full-time solo seller, $60k gross, CA

$60,000 gross sales. $22,000 COGS. $6,000 expenses (Etsy fees, ads, software, mileage). Net SE income = $32,000. Filing single, no other household income.

• • SE tax: $32,000 × 0.9235 × 0.153 = $4,521
• • Half-SE deduction: $2,261
• • Standard deduction (single): $15,000
• • Pre-QBI taxable: $32,000 - $2,261 - $15,000 = $14,739
• • QBI deduction: 20% × $14,739 = $2,948
• • Taxable income: $11,791. Federal income tax: $1,179
• • CA state tax: ~$32,000 × 7.3% = $2,336
• • Total annual: $4,521 + $1,179 + $2,336 = $8,036
• • Quarterly payment: $2,009

Set aside $2,000 from each quarter's profit and you are covered. The same shop in Texas would owe $5,700 total ($1,425/quarter), CA-vs-TX is a $2,300 swing for an otherwise identical business.