S-Corp payroll savings vs lost QBI Tax year 2026

Q: How much do payroll-only S-corp calculators overstate on $140,000 of profit?

Using PiggyMath’s 2026 S-corp engine (single filer, $65,000 salary, $2,400 admin, 5% state), payroll tax saved is about $9,836. The same salary shrinks the §199A deduction by about $9,276, costing roughly $2,041 of federal income tax. After running costs the true net is about $4,716 — roughly $5,100 less than the payroll-only pitch.

The payroll-tax half of the S-corp pitch is real. The §199A half most tools omit is often thousands of dollars.

Wrong vs right §199A trade-off Live calculator

By The PiggyMath Editorial Desk Last updated August 13, 2026 ✓ Dual-checked against published 2026 IRS figures

Finding: Most S-corp calculators (and a lot of advice) show only the payroll / SE tax you save by taking a salary and distributing the rest. They omit that wages are not qualified business income under §199A — so the same salary shrinks the 20% QBI deduction. On $140,000 of profit with a $65,000 salary (single, 2026), payroll-only tools advertise about $9,800 saved; after ~$2,000 of QBI tax cost and typical admin the true net is about $4,700 — an overstatement of roughly $5,100. Educational prep only — PiggyMath does not e-file and this is not tax advice.

The wrong rule vs the right rule

Wrong (common): S-corp benefit ≈ SE tax on full profit − FICA on salary. Stop. Celebrate the five-figure “savings.”

Right (below the §199A threshold): also subtract the income-tax cost of the QBI you give up, because owner wages are not QBI, then subtract recurring payroll / 1120-S costs. Net benefit = payroll saved − QBI tax cost − running costs (± state effects).

Right (above the threshold): the wage limitation can flip the story — without W-2 wages a sole proprietor’s deduction may collapse, so salary can create QBI capacity. Same statute, opposite direction. See IRS — Qualified Business Income Deduction and S corporation compensation.

Figure 1. Worked example — $140,000 profit, $65,000 salary, single, non-SSTB, tax year 2026
	Wrong (payroll only)	Correct (full trade-off)	Dollar gap
SE tax (sole prop)	~$19,781 on 92.35% of profit		—
Payroll tax (S-corp on salary)	~$9,945 (employer + employee FICA)		—
Payroll / SE tax “saved”	$9,836	$9,836	—
§199A deduction	Ignored	$22,802 → $13,526	$9,276 smaller deduction
Tax cost of lost QBI	$0 in the pitch	~$2,041 federal	+$2,041
Payroll / 1120-S admin	Often ignored	$2,400 (illustrative)	+$2,400
Headline “benefit”	~$9,836	~$4,716 net (engine total)	~$5,120 overstated

Source: PiggyMath modeled estimates using the same scorpPaths / qbiDeduction engines as the live calculators (tax-constants-2026.json), with a 5% flat state rate. “Net” includes federal + state + payroll + admin — not payroll alone. Canonical URL: https://piggymath.com/s-corp-payroll-vs-qbi/. Not filing advice.

Figure 2. Payroll-only pitch vs full net — ~46% salary ratio, $2,400 admin, single, 5% state (2026)
Profit	Salary	Payroll saved (wrong headline)	QBI tax cost	True net (engine)	Overstatement
$60,000	$28,000	$4,194	$293	$1,552	$2,641
$80,000	$37,000	$5,643	$563	$2,608	$3,035
$100,000	$46,500	$7,015	$1,289	$3,027	$3,988
$120,000	$55,500	$8,464	$1,653	$3,916	$4,548
$140,000	$65,000	$9,836	$2,041	$4,716	$5,121
$160,000	$74,500	$11,209	$2,649	$5,230	$5,979
$200,000	$93,000	$14,005	$3,470	$6,800	$7,205

“Overstatement” = payroll saved − true net (so it includes QBI tax cost, admin, and state/federal interactions). Near and above the §199A threshold the curve changes — run the calculator below rather than extrapolating this table. Salary ratios are illustrative, not a safe harbour.

Why wages punch a hole in QBI

Section 199A lets pass-through owners deduct up to 20% of qualified business income. For a sole proprietor, QBI is essentially Schedule C profit reduced by the deductible half of SE tax. For an S corporation, QBI is the K-1 pass-through — not the W-2 wages you pay yourself.

That is the trap. The salary that creates the payroll-tax saving is the same salary that leaves the 20% deduction. A tool that puts a deduction dollar next to a tax dollar without converting both to tax will still mislead: a $9,276 smaller deduction is not a $9,276 cost — at a mid bracket it is roughly $2,000 of tax. This page prices QBI in tax for that reason.

Above the threshold the arrow reverses

For 2026 the §199A thresholds are $201,750 single and $403,500 married filing jointly, with phase-in ranges of $75,000 / $150,000 [Rev. Proc. 2025-32]. Above the range, the deduction is capped at the greater of 50% of W-2 wages or 25% of wages plus 2.5% of qualified property. A sole proprietor typically has zero owner W-2 wages — so the deduction can fall toward zero. An S-corp salary suddenly becomes the thing that unlocks QBI rather than the thing that destroys it.

Specified service trades (consulting, law, health, accounting, financial services, athletics, performing arts) lose the deduction entirely across that range — no amount of salary rescues an SSTB once income clears the top. Toggle SSTB in the calculator to watch the QBI line disappear.

Reasonable compensation is still the hard constraint

There is no safe percentage in the statute. “Pay yourself 40% of profit” is folklore. The IRS standard is what the corporation would pay someone else to do your job — duties, hours, experience, comparable pay, ability to pay. An aggressive low salary to maximize distributions (and maximize the payroll pitch) is exactly what gets recharacterised. Use the reasonable salary calculator for a role-based figure, not a ratio.

2026 constants this page uses

Social Security wage base: $184,500 [SSA 2026 CBB]
§199A threshold / range: $201,750 / $75,000 single; $403,500 / $150,000 MFJ [Rev. Proc. 2025-32]
SE net-earnings factor: 92.35% [IRS SE tax]
Combined OASDI / Medicare rates on wages: 12.4% + 2.9% (split employer/employee on the S-corp side)

Machine-readable copies with source URLs live in data/tax-constants-2026.json. Runtime still mirrors these values in assets/app.js.

Who is affected / who is not

Affected: freelancers and small-business owners below (or near) the §199A threshold who are sold an S-corp on payroll-tax savings alone — especially when the “calculator” never mentions QBI.

Less affected by this particular omission: high-income non-SSTB owners already in the wage-limitation zone (QBI may argue for a salary); SSTBs already fully phased out (QBI drops out of both structures); people whose profit is too low for the election to clear admin costs even before QBI.

Related wrong-vs-right math: Solo 401(k) 20% vs 25%, Form 2210 annualized method, and PTC repayment uncapped in 2026 — other places freelancer tools quietly stop too early.

Run your numbers (embedded S-corp vs sole calculator)

Same engine as the dedicated S-Corp vs Sole Proprietor Calculator. Defaults to the Figure 1 case. Math stays in your browser — we do not e-file.

Your business

Net profit before owner pay ($)

Salary you'd pay yourself ($) There is no percentage rule in the law — see reasonable compensation

Is it a specified service business?

Your household

Filing status

Other household income ($)

State income tax rate (%)

Cost of running it

Payroll service and 1120-S preparation ($/year)

State franchise or minimum tax ($/year) California charges 1.5% of net income with an $800 minimum; several other states have their own

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Sole proprietor — total cost

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S corporation — total cost

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The half everyone shows you

Payroll tax saved

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The half they don't

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Running costs

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Where the election starts to pay

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The risk that is not in the arithmetic

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How to cite

Suggested citation line (copy/paste):

PiggyMath Editorial Desk. “S-Corp Payroll Savings vs Lost QBI: What Most Advice Leaves Out (2026).” PiggyMath, 13 Aug. 2026, https://piggymath.com/s-corp-payroll-vs-qbi/. Modeled educational estimates using IRS §199A / Schedule SE / S-corp payroll math for tax year 2026.

Methodology Full S-corp tool QBI calculator Solo 401(k) 20% vs 25%

Frequently asked questions

Do S-corp wages reduce the QBI deduction?

Below the §199A threshold, yes. Owner wages are not qualified business income, so every dollar of reasonable compensation leaves the 20% deduction. The payroll-tax saving from paying yourself a salary is real — but tools that stop there overstate the net benefit.

How much do payroll-only S-corp calculators overstate on $140,000 of profit?

Using PiggyMath’s 2026 engine (single, $65,000 salary, $2,400 admin, 5% state), payroll tax saved is about $9,836. The same salary shrinks the §199A deduction by about $9,276, costing roughly $2,041 of federal income tax. After running costs the true net is about $4,716 — roughly $5,100 less than the payroll-only pitch.

When does an S-corp salary help QBI instead of hurting it?

Above the 2026 thresholds ($201,750 single / $403,500 MFJ), §199A is capped by W-2 wages (or wages plus UBIA). A sole proprietor has no owner wages, so the deduction can collapse. An S-corp salary creates the wages that unlock it — the trade-off flips.

Is there a safe salary percentage for S-corp owners?

No. There is no statutory 60/40 or similar safe harbour. Reasonable compensation is what the business would pay someone else to do the work. An unreasonably low salary can be recharacterised as wages with back payroll tax, interest and penalties.

Sources

Every formula on this page is checked against an independent implementation before publication. How we check our math →

PiggyMath provides estimates for educational purposes only and is not financial, tax or legal advice. We help you plan and set aside — we do not e-file returns. No Enrolled Agent or CPA has reviewed this page unless separately disclosed with credentials and a review date.