Self-employment (SE) tax on Schedule C net profit — Social Security to the 2026 $184,500 wage base, Medicare, Additional Medicare, and the deductible half.

Self-employment (SE) tax on Schedule C net profit — Social Security to the 2026 $184,500 wage base, Medicare, Additional Medicare, and the deductible half.

Payment: x402 ($0.05 USDC on eip155:8453). Call unpaid to receive an HTTP 402 with requirements, then retry with the PAYMENT-SIGNATURE header. Method: seBase = netProfit*0.9235; SS = 12.4%*min(seBase, 184500 - W2 SS wages); Medicare = 2.9%*seBase; +0.9% over the filing threshold; deductible half = (SS+Medicare)/2