Free 2026 Small Business Tax & Deduction Calculators
2026 S-Corp 15.3% Tax Shield & Section 179 Equipment Write-Off Calculators
Built by the RiverTaxes AI + CPA team. Model your exact S-Corp payroll vs. distribution split or calculate your Year-1 cash tax savings on service trucks, heavy SUVs, and commercial equipment.
Tool #1 · 2026 S-Corp Self-Employment Tax Shield Calculator
How Much Does an S-Corp Election Save You vs. a Standard LLC?
Standard single-member LLCs pay the full 15.3% self-employment (FICA) tax on 100% of net profit. With an S-Corp, only your reasonable W-2 salary is subject to FICA—shielding your shareholder distributions from the 15.3% tax.
$185,000/yr
42% ($77,700 W-2 / $107,300 Dist.)
Standard LLC SE Tax
$26,140/yr
S-Corp FICA Payroll Tax
$11,888/yr
Estimated Annual Tax Saved
$14,252/yr
5-Year Compounding Tax Savings: $71,260
Tool #2 · 2026 Section 179 Equipment & Heavy Truck/SUV Write-Off Calculator
Calculate Your Year-1 Section 179 Tax Deduction & Net Equipment Cost
Even if you finance a service truck, excavator, medical laser, or heavy SUV (>6,000 lbs GVWR) with $0 down, IRC Section 179 lets you deduct up to 100% of the qualifying purchase price in Year 1.
$85,000
90%
32%
Year-1 Tax Cash Saved
$24,480
True Net Cost After Tax Write-Off: $60,520
2026 CPA-Approved FinTech, Payroll & Banking Stack