Startup Cost or Operating Expense? Opening Day Decides

By Yarik Yarosh, CPA ·September 5, 2026 ·Updated October 16, 2026 ·8 min read

Written by Yarik Yarosh, CPA (US & Canada) September 5, 2026 · FL CPA license AC61704 · CPA Ontario

The same rent check can be a full deduction or a 15-year write-off, depending on whether you paid it before or after your business began. Costs you’d deduct right away if the business were already running, but that you pay before it starts, are startup costs under the IRC 195 startup cost rules: up to $5,000 deducted in the first year, less once total startup costs pass $50,000, and the rest spread over 180 months. Pay the same cost after opening day and it’s an ordinary business expense, deducted in full that year. So the date your business begins decides which rule applies, and a little planning around that date can move real money into year one.

✓Key takeaway

Startup costs vs. operating expenses:

Timing	Classification	Deduction
Before business opens	Startup cost (IRC 195)	$5,000 immediate + remainder over 180 months
After business opens	Operating expense (IRC 162)	Fully deductible in year incurred

The $5,000 / $50,000 rule:

Total Startup Costs	Immediate Deduction	Amortized Remainder
$5,000 or less	Full amount	$0
$10,000	$5,000	$5,000 over 180 months
$30,000	$5,000	$25,000 over 180 months
$50,000	$5,000	$45,000 over 180 months
$52,000	$3,000 ($5,000 - $2,000 excess)	$49,000 over 180 months
$55,000+	$0 (fully phased out)	$55,000 over 180 months

What qualifies as a startup cost:

Startup Cost (IRC 195)	NOT a Startup Cost
Market research and surveys	Equipment purchases (depreciable asset, not startup cost)
Advertising before opening	Inventory (COGS when sold)
Travel to investigate the business	Land/building (capitalize, not startup)
Training employees before opening	Loan interest (deductible as interest, not startup)
Consultant fees for business planning	Franchise fees (Section 197 intangible, 15-year amortization)
Wages paid during startup phase	Personal living expenses during startup
Rent paid before business opens	Organizational costs (separate category, IRC 248/709)

Organizational costs (separate from startup costs):

Organizational Cost (IRC 248/709)	NOT Organizational
LLC filing fee (Articles of Organization)	Costs of issuing/selling stock
Attorney fees for operating agreement	Transfer taxes on assets
State registration fees	Costs of acquiring assets
Accounting fees for initial setup

Organizational costs follow the same $5,000 / $50,000 / 180-month rule as startup costs, but they are a separate category with their own $5,000 allowance.

How do startup costs work for a new trade business?

Hypothetical example

Round numbers. For current guidance, see IRS Publication 583 (Starting a Business). A new HVAC contractor. Sole proprietor. Planning the business from January through March. First customer served April 1.

Pre-opening costs (January 1 through March 31):

Expense	Amount	Classification
HVAC certification course	$3,000	Startup cost (training)
Business plan consulting	$2,000	Startup cost
Market research (competitor pricing, demand)	$500	Startup cost
Website development	$3,000	Startup cost (advertising/marketing)
Business cards and yard signs	$800	Startup cost (advertising)
Rent for shop (Jan-Mar, 3 months)	$4,500	Startup cost (operating before opening)
Insurance premiums (3 months)	$1,500	Startup cost
Legal fees (LLC formation)	$1,200	Organizational cost (NOT startup)
LLC filing fee	$125	Organizational cost
Total startup costs	$15,300
Total organizational costs	$1,325

Equipment purchases (NOT startup costs):

Equipment	Amount	Classification
Work van	$35,000	Depreciable asset (Section 179 or bonus depreciation)
HVAC tools and diagnostic equipment	$12,000	Depreciable asset
Office computer and printer	$1,500	Depreciable asset (de minimis safe harbor)
Total equipment	$48,500	Not startup costs

Year 1 tax treatment:

Startup costs ($15,300): Immediate deduction: $5,000 (total startup costs under $50,000, so no phase-out) Remainder: $15,300 - $5,000 = $10,300 Monthly amortization: $10,300 / 180 months = $57.22/month Year 1 amortization (April through December, 9 months): $57.22 x 9 = $515

Year 1 startup cost deduction: $5,000 + $515 = $5,515

Organizational costs ($1,325): Immediate deduction: $1,325 (under $5,000, fully deductible immediately)

Equipment ($48,500): Section 179 or bonus depreciation: $48,500 (fully deductible in Year 1)

Post-opening operating expenses (April 1 through December 31):

Expense	9-Month Total	Classification
Rent (Apr-Dec)	$13,500	Operating expense (fully deductible)
Insurance (Apr-Dec)	$4,500	Operating expense
Vehicle fuel and maintenance	$6,000	Operating expense (or mileage)
Advertising (ongoing)	$4,000	Operating expense
Supplies and materials	$15,000	Operating expense (or COGS)
Total operating expenses	$43,000	Fully deductible in Year 1

Year 1 deduction summary:

Category	Deduction
Startup costs (immediate + amortization)	$5,515
Organizational costs	$1,325
Equipment (Section 179/bonus)	$48,500
Operating expenses (post-opening)	$43,000
Total Year 1 deductions	$98,340

The critical distinction (before vs. after opening): The $4,500 in rent paid January through March (before opening) is a startup cost, amortized over 180 months ($25/month deduction). The $13,500 in rent paid April through December (after opening) is an operating expense, fully deductible in Year 1.

If the contractor had waited until April 1 to sign the lease: the full $18,000 in annual rent would be an operating expense (fully deductible). Starting the lease 3 months early converted $4,500 from a full deduction to a $375/year amortization deduction.

Planning strategies:

Minimize pre-opening expenses. Everything possible should be pushed to AFTER the business opens. Sign the lease the week you start serving customers. Order business cards the week you start.
Define “opening day” carefully. The business begins when it starts the activity for which it was organized. For a service business, this is typically when the first service is performed (not when the first invoice is sent or the first payment received). An HVAC contractor who serves their first customer on March 15 has an opening date of March 15, and costs from March 16 forward are operating expenses.
Equipment isn’t affected. Equipment purchases are depreciable assets regardless of whether they’re bought before or after the business opens. A van bought in February gets the same Section 179 treatment as a van bought in May.
The election is automatic. The IRC 195 election to deduct $5,000 and amortize the remainder is made on the first-year return. No separate filing is required. But if the election is not made, the startup costs must be capitalized with no amortization until the business is sold or abandoned.
Investigate-but-don’t-start costs: If the taxpayer investigates starting a business but decides not to, general-search costs are personal and nondeductible, but for an individual, costs of trying to start a specific business are deductible as a capital loss (IRS Pub. 535, 2022). Exception: if the investigation is in the same type of business the taxpayer is already in, the costs may be currently deductible as expansion costs.

Illustrative numbers only, not a real client and not advice for your facts.

Should a new HVAC contractor use 179 or bonus on equipment?

Both can write off the HVAC tools in the first year, and the van too if it’s rated over 6,000 pounds, and neither one touches the $5,000 startup cost rules, because equipment isn’t a startup cost. Bonus applies automatically at 100% for property acquired after January 19, 2025. Section 179 is optional and can’t exceed your taxable income from active trades or businesses, so it fits best once you know the first year’s profit.

Section 179 is also the more precise tool. You pick which assets it covers and how much of each, while bonus can only be switched off for an entire class of property, like all 5-year property, and that election needs IRS consent to revoke. Used diagnostic equipment works for both if you buy it from an unrelated seller and haven’t used it before. More on the startup side in Deducting Startup Costs and Business Startup Costs.

How much of your startup costs can you deduct in the first year?

Under IRC 195, you can deduct up to $5,000 of startup costs in the year your business begins operations, with the $5,000 reduced dollar-for-dollar for total startup costs exceeding $50,000. Remaining startup costs above the first-year deduction are amortized over 180 months (15 years) beginning in the month the business opens. Startup costs include market research, advertising before opening, employee training, travel to scout locations, and consultant fees for setting up the business. Organizational costs for forming a corporation or partnership get their own separate $5,000 first-year deduction with the same $50,000 phase-out and 180-month amortization, so you can potentially deduct up to $10,000 in total organizational and startup costs in year one.

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Cite this page

Yarik Yarosh, CPA. "Startup Cost or Operating Expense? Opening Day Decides." Blue Cloud CPA, September 5, 2026, updated October 16, 2026. https://bluecloudcpa.com/guides/small-business-startup-costs-irc-195-organizational

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.

Startup Cost or Operating Expense? Opening Day Decides

How do startup costs work for a new trade business?

Should a new HVAC contractor use 179 or bonus on equipment?

How much of your startup costs can you deduct in the first year?

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