Calculate Your Section 179 Tax Savings

Section 179 of the U.S. tax code lets business owners deduct the full purchase price of qualifying equipment and software in the year it is placed in service, rather than depreciating it over several years. For many small and mid-sized businesses, that deduction can translate into tens or even hundreds of thousands of dollars in immediate tax savings. Understanding exactly how to calculate those savings before you sign a purchase agreement lets you make a smarter financing decision.

This post walks through the Section 179 calculation methodology step by step, with a fully worked numerical example so you can model your own scenario. As always, consult a CPA or tax advisor before finalizing any tax strategy, because individual circumstances vary and tax law changes frequently.

How the Section 179 Deduction Is Calculated

The core formula is straightforward. You take the total cost of qualifying equipment placed in service during the tax year, cap it at the Section 179 limit (approximately $1.16 million for 2026, though you should verify the final IRS figure with your CPA), and multiply that deduction by your effective marginal tax rate. The result is your estimated tax savings in dollars.

Tax Savings = Section 179 Deduction x Marginal Tax Rate

For example, suppose your business is taxed as an S-corporation and your combined federal and state marginal rate is 32%. You purchase $250,000 worth of qualifying CNC machines in November 2026 and place them in service before December 31. Your Section 179 deduction is $250,000. Multiply that by 0.32 and you get $80,000 in estimated tax savings. Your after-tax net cost of the equipment drops from $250,000 to $170,000. That is a substantial difference, and it is entirely legal provided the equipment qualifies and your business has sufficient taxable income to absorb the deduction.

The Phase-Out Threshold and Bonus Depreciation as a Supplement

Section 179 has two important limits to understand. First, the deduction cannot exceed your business's net taxable income for the year. If your business earned $180,000 in taxable income and you claim a $250,000 Section 179 deduction, you can only use $180,000 of it this year. The remainder carries forward to future tax years, but you lose the immediate benefit.

Second, the deduction begins to phase out dollar-for-dollar once total equipment purchases exceed the phase-out threshold. In recent years that threshold has sat around $2.89 million. If your business buys $3.5 million in equipment, the excess above the threshold ($610,000) reduces your Section 179 deduction by the same amount, potentially eliminating it entirely for very large capital spenders.

That is where bonus depreciation becomes valuable. For 2026, bonus depreciation is scheduled at 40% of the adjusted basis of qualifying property placed in service during the year (down from 60% in 2024 and 80% in 2023 as the provision phases out). Bonus depreciation applies after Section 179 and covers the remaining depreciable basis. Using the $3.5 million equipment example, a business that maxes out its available Section 179 deduction can then apply 40% bonus depreciation to the remaining cost basis, capturing additional first-year write-offs. Work through these numbers with a CPA because the interaction between Section 179, bonus depreciation, and MACRS regular depreciation can get complicated quickly.

A Fully Worked Numerical Example

Here is a realistic scenario for a manufacturing company buying equipment in late 2026.

Setup: A job-shop manufacturer purchases a laser cutting system for $420,000 and a material-handling robot for $130,000, for a combined equipment cost of $550,000. Both items are placed in service before December 31, 2026. The business files as an LLC taxed as a C-corporation with a federal marginal rate of 21%. The state corporate rate adds another 6%, for a combined marginal rate of 27%. Taxable income before the Section 179 deduction is projected at $610,000.

Step 1: Confirm eligibility. Both the laser cutter and the robot are tangible personal property used in the business. They qualify. Total eligible cost: $550,000, which is below the $1.16 million Section 179 cap and well below the phase-out threshold.

Step 2: Apply the deduction. The business elects to deduct the full $550,000 under Section 179. Taxable income after the deduction drops from $610,000 to $60,000. The deduction does not exceed taxable income, so no carry-forward is needed.

Step 3: Calculate tax savings. Tax savings = $550,000 x 27% = $148,500. Without Section 179, the business would owe roughly $164,700 in combined tax on $610,000 of taxable income. With Section 179, it owes approximately $16,200 on the remaining $60,000. The effective first-year savings are about $148,500, reducing the after-tax equipment cost from $550,000 to roughly $401,500.

Step 4: Check the after-tax monthly payment. If the business financed the $550,000 over 60 months at an 8% annual rate, the monthly payment would be approximately $11,155. Spread the $148,500 tax savings over 12 months and the net monthly cost in year one (before the tax benefit) becomes about $11,155 minus $12,375 in monthly tax relief, meaning the equipment is effectively cash-flow-positive in its first year relative to the tax savings generated. This is a simplified view, since the tax benefit arrives as a lump sum at filing, but it illustrates why many businesses time large equipment purchases near year-end.

How TurboFunding Helps

Once you have run your Section 179 calculation and identified the equipment you want to buy, the next question is how to fund the purchase. TurboFunding works with businesses that have at least $10,000 in monthly revenue, a 550 FICO score, and six or more months of operating history. We connect qualifying businesses with equipment financing from $10,000 up to $5 million. The application takes about three minutes and runs a soft credit pull only, so there is no hit to your credit score just for checking your options. Because Section 179 allows you to deduct the full purchase price even on financed equipment, financing a large equipment purchase through TurboFunding can let you capture the full tax deduction now while spreading the cash outflow over months or years. That is a powerful combination for businesses managing working capital alongside growth investments. Find out More

Frequently Asked Questions

Q. What is the Section 179 deduction limit for 2026?

A. The deduction limit is approximately $1.16 million for 2026, with a phase-out beginning around $2.89 million in total equipment purchases. These figures are adjusted annually for inflation, so confirm the exact numbers with the IRS or your CPA before filing.

Q. Can I use Section 179 on financed or leased equipment?

A. Yes. Section 179 applies to equipment you own and place in service during the tax year, regardless of whether you paid cash or financed it. Leased equipment can also qualify in certain structures, but the rules differ. Ask your CPA whether a specific lease qualifies.

Q. What is the difference between Section 179 and bonus depreciation?

A. Section 179 is an elective deduction you can apply up to the annual cap and your net taxable income limit. Bonus depreciation is a percentage-based first-year write-off that applies after Section 179 to the remaining cost basis. Bonus depreciation is currently phasing down (40% in 2026) and, unlike Section 179, can generate a net operating loss that carries forward to future years.

Q. What types of equipment qualify for Section 179?

A. Qualifying property generally includes tangible personal property used in a trade or business, such as machinery, vehicles (with certain limitations for passenger vehicles), computers, office furniture, and certain software. Real property like buildings typically does not qualify, though some improvements to nonresidential property do qualify under separate rules.

Q. Does Section 179 apply if my business has a net loss this year?

A. No. Section 179 cannot create or increase a net operating loss. If your business is already at a loss, you cannot use Section 179 in that year. The unused deduction carries forward to future tax years when you have taxable income to offset. Bonus depreciation does not have this restriction, which is one reason it remains useful for early-stage or loss-year businesses.

Calculating your Section 179 tax savings before a major equipment purchase gives you a clearer picture of the real after-tax cost and helps you make a more informed financing decision. The deduction is one of the most valuable tools available to small and mid-sized business owners, and pairing it with the right equipment financing can turn a large capital expenditure into a cash-flow-neutral or even positive move in year one. If you are ready to explore financing options that work alongside your Section 179 strategy, TurboFunding can match you with lenders in minutes. Find out More