Equipment Financing Calculator
Compare an equipment loan vs an operating lease vs a capital lease — with monthly payment, total cost, Section 179 + bonus depreciation tax savings, and after-tax effective APR. The calculator that finally shows the tax math, not just the payment.
Total cost (payments + down + residual + sales tax): $60,829
over 60 mo
8.00% nominal APR
Cash payments out (left bars) vs tax savings from §179 + bonus + MACRS (right bars). Year 1 is when most of the tax shield lands if §179 is enabled.
View the TypeScript implementation on GitHub: packages/calc/src/equipment-financing.ts · view tests
What this means
For most U.S. small businesses buying equipment in 2026, the single biggest economic factor isn't the interest rate — it's the Section 179 immediate expensing deduction. A $50,000 equipment purchase at a 21% marginal tax rate produces $10,500 in year-1 tax savings, which in cash terms is roughly the equivalent of ten months of payments on a 60-month amortization. That's why the after-tax effective APR can come in materially below the nominal APR — sometimes 200+ basis points lower for under-cap businesses where §179 absorbs the entire basis.
The trade-off between loan and operating lease isn't about which is cheaper in total dollars; the loan almost always wins on total cost because you build equity. The trade-off is about cash-flow shape and residual risk. Operating leases produce a lower monthly payment by deferring 10–20% of the price to a balloon you can choose to pay, renegotiate, or walk away from — which is exactly the right call for rapidly-depreciating tech equipment, but the wrong call for long-life machinery you'd use for 15+ years.
Worked example
A construction company buys a $250,000 excavator. 10% down ($25,000), $225,000 financed at 8.5% over 60 months. The company is an S-corp whose owner is in a 21% effective marginal bracket (federal + state blended). They take Section 179 in year 1 and use standard 5-year MACRS for the residual basis. Running the numbers:
- Monthly P&I: ~$4,615
- Total payments over 60 months: ~$276,900
- Total interest: ~$51,900
- Year-1 §179 deduction: full $250,000 expensed (under the $1.16M cap) → $52,500 cash tax savings, ~11 months' worth of payments back.
- After-tax effective APR: drops from ~8.5% nominal to roughly 6.5% effective.
Conclusion: the §179 deduction is the single biggest economic factor. Without it, equipment financing is meaningfully more expensive than the nominal rate suggests; with it, the after-tax math frequently beats SBA-rate alternatives that take 60+ days to close. If the same company had been over the §179 cap (say, $1.5M of qualifying purchases), the 2026 phase-down to 20% bonus depreciation on the excess would substantially soften the tax-savings math, and a longer-term SBA 504 package would start to look more attractive.
Frequently asked questions
The information and tools on this website are for general educational purposes only and do not constitute financial, investment, legal, or tax advice. Consult a licensed professional for decisions specific to your situation.