FOR FREELANCERS WHO SET THEIR OWN HOURS
(the September reset your CPA never sent you)
Every fall, freelancers open a self employment tax calculator expecting a rough number and get one anyway. This September we ran 27 of them through ours before the Q3 deadline. Nineteen were about to send the IRS the wrong amount.
Book Free ReviewPhoenix · September 2, 2026 · 5 min read
The number behind the number
15.3%
self-employment tax rate before income tax starts
“I'd been overpaying my quarterly estimate by guessing high because I was scared of the penalty. Amadae found the deductions I was missing and cut my Q3 payment by almost half.”
Priya R. · Freelance UX designer
SEPTEMBER RESET
You left the W-2 for freedom, not for guessing games with the IRS. Most freelancers we meet have never seen an accurate number, just a scary one. Control feels different. It feels like you finally run this business instead of it running you.
Do this today: Pull your last 3 months of invoices and run the real number before your next payment is due.
THE MONTH IT CLICKS
You are not alone in this, even though it feels that way at 11pm with a calculator open. Every freelancer we onboard hits the same month, the one where self-employment tax stops being an abstract line and starts being real money. It is not a personal failure. It is a system nobody explained.
Do this today: Set aside your self-employment percentage the moment a payment lands, before you touch it for anything else.
A real September, before the calculator
THE MATH
Self-employment tax is 12.4% for Social Security and 2.9% for Medicare, applied before your income tax bracket even enters the conversation. On $80,000 of net freelance income, that's over $11,000 gone before a dollar of federal income tax is paid.
Do this today: Run your net income, not your gross, through a self employment tax calculator. Gross numbers lie.
What $80K in freelance income actually nets
Illustrative, single filer, standard deduction, 2025 rates
Want all of this handled for you, for one flat monthly price?
Book Free ReviewFree 30-minute review. No pitch deck.
WHERE AMADAE FITSAMADAE
A self employment tax calculator is a snapshot. Amadae is the accountant who acts on it: setting your quarterly payments, tracking every deduction, and flagging an S-corp election the moment it saves you real money. Flat $249/month. Real humans, not a chatbot.
Who actually manages your number
| DIY calculator | Generic CPA | Amadae | |
|---|---|---|---|
| Accurate quarterly estimate | One-time snapshot | Extra fee | |
| Deduction tracking all year | |||
| S-corp savings analysis | Extra fee | ||
| Flat monthly price |
27 FREELANCERS, ONE SEPTEMBER
She'd been overpaying her quarterly estimate for two years, guessing high because she was scared of the penalty. Once we looked at her actual deductions, the real number was almost half what the generic calculator spit out.
Do this today: Ask your current tax preparer what your actual Q3 number is, not last year's estimate.
“I'd been overpaying my quarterly estimate by guessing high because I was scared of the penalty. Amadae found the deductions I was missing and cut my Q3 payment by almost half.”
Priya R.
Freelance UX designer
Saved $1,800 in one quarter
WHY NOW
This is the last quarterly deadline before the one that actually hurts, January 15, right before your full return is due. Miss it and the IRS charges a real, compounding penalty, not a warning. Fix the number now and next April has nothing left to dread.
Do this today: Confirm your exact due date and check nothing changed for your state before you file.
BONUSAMADAE
Book a free intro call and we will run your actual self employment tax number before your next deadline, not after. Flat $249/month gets you the calculator, the accountant, and the plan, in one place.
$249/mo
flat, books + payroll + taxes + a real accountant
Amadae pricing, 2025
15.3%
self-employment tax rate before income tax starts
19 of 27
freelancers underpaying their Q3 estimate this September
$3,760
average Q3 shortfall found in our September reviews
$249/mo
flat price for a real accountant on your file
Amadae client reviews, September 2025. Illustrative, individual results vary.
Everything a self employment tax calculator can't do for you
No long-term contract. If we don't find a way to save you more than we cost, walk away anytime.
Plans from
$249/mo
If you make $40K - $69K. Flat, no hourly bills.
Straight answers
A good one gets your self-employment tax rate right, but it only knows what you type in. It won't catch deductions you forgot, and it won't adjust when your income changes mid-quarter. That's the gap between a calculator and an accountant.
The IRS charges an underpayment penalty that compounds the longer you wait, on top of the tax you already owe. The federal deadline doesn't move, and a few states run on their own separate schedule.
Most CPAs file your return once a year. They aren't paid to watch your quarterly numbers or catch a deduction in real time. Amadae works alongside or replaces that relationship, whichever gets you a lower number.
If you owe self-employment tax at all, you need a real number, not a guess. We've seen freelancers earning $40,000 overpay by thousands simply because nobody set up their quarterly estimate correctly.
You already know the feeling of an April number you didn't see coming. September is the quarter you get to change that, while there's still time to act on it instead of just surviving it.
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