What is the self-employment tax rate?

15.3% - 12.4% for Social Security and 2.9% for Medicare - applied to 92.35% of your net self-employment profit. Because of the 92.35% factor the effective rate on profit is about 14.13%. The Social Security portion only applies up to the annual wage base; Medicare has no cap.

Can I deduct half of my self-employment tax?

Yes. Half of the SECA tax is deductible at the personal level, which reduces your adjusted gross income even if you do not itemise.

Why is my effective rate lower than my bracket?

Two reasons: brackets are marginal, so only the income above each threshold is taxed at that rate, and the QBI deduction removes 20% of qualified business income from taxable income before the brackets are applied.

Do I still pay self-employment tax if I have a W-2 job?

Yes, on the self-employed profit - but the Social Security portion stops once your combined wages and self-employment income reach the annual wage base, because that part of the tax is capped.

How much is self-employment tax in Kentucky?

Self-employment tax is federal, so it is the same everywhere: 15.3% (12.4% Social Security up to the wage base, 2.9% Medicare with no cap) applied to 92.35% of net profit. On top of that, Kentucky adds roughly 4% state income tax.

Does Kentucky tax 1099 income?

Yes. Kentucky taxes net 1099 profit as individual income at roughly 4% for a typical self-employed earner. Flat 4% state income tax.

When are quarterly estimated tax payments due in Kentucky?

Federal quarterly deadlines are April 15, June 15, September 15 and January 15. Kentucky state estimated payments follow the same dates. Use the quarterly calculator above to size each payment.

Self-employment tax

Self-employment tax calculator for Kentucky

Freelancing or consulting in Kentucky? Enter your net profit and see the 15.3% SECA tax, federal income tax, state income tax (approximately 4%), your take-home pay, and the exact amount to set aside each month.

Estimate only, not tax advice. State tax is approximated at a single rate; QBI high-income limits are not modelled; credits, retirement plans and health insurance benefits are excluded. Tax year .

Estimated total tax

Self-employment tax + federal income tax + state income tax

Self-employment (SECA) tax

Federal income tax

State income tax

Take-home

Effective rate

Set aside each month

Quarterly payment (90% safe harbour)

See what an S-corp would save ->

Where the number comes from

Item	Amount	Notes

How the self-employment tax works

Self-employment tax exists because nobody withholds it for you. When you are an employee, your employer pays half of Social Security and Medicare and withholds the other half from your pay. When you work for yourself, you are both sides.

The calculation, in order

Net profit - revenue minus expenses on Schedule C.
Multiply by 92.35% - this factor stands in for the employer half being deductible, which is why the effective rate is 14.13% and not 15.3%.
Apply 12.4% for Social Security, up to the annual wage base. Above that, this portion stops.
Apply 2.9% for Medicare, with no cap. Add 0.9% above the additional Medicare threshold.
Deduct half of the result before computing income tax.
Apply the QBI deduction (20% of qualified business income) and then the ordinary brackets.

The trap: your marginal rate is not what you keep

Every extra dollar of profit is hit twice - once by the 15.3% SECA base and once by the income tax brackets - and the QBI deduction shrinks the second hit, not the first. At $100,000 of profit, the combined effective rate on the whole sum is usually in the low twenties. The marginal rate on the next dollar is much higher.

What moves the number most

Retirement contributions - a SEP-IRA or Solo 401(k) reduces income tax, not the SECA tax. Big effect.
Health insurance premiums - the self-employed health insurance deduction comes off AGI.
Structure - the only lever that touches the 15.3% itself is an S-corp election. That is what the decision tool is for.

Questions

Is the 15.3% applied to all of my profit?

To 92.35% of it, yes - but the Social Security portion only applies up to the annual wage base. If you also have a W-2 job, your wages count toward that cap first, which can cut this tax substantially.

Why does my state number look rough?

Because it is. State income tax has brackets, credits and local add-ons; we model one approximate rate per state. It ranks decisions well and files returns badly. Treat it as a placeholder until your accountant gives you the real number.

Should I set aside the monthly figure?

Yes - that is the point of showing it. Transfer it to a separate account the same day you get paid, and the quarterly deadlines become administrative rather than painful.

Quarterly deadline reminders

Four emails a year, on the four due dates.