Using Business Losses Strategically: How Tax Loss Carryforwards Reduce Future Tax Bills

By Yarik Yarosh, CPA ·September 5, 2026 ·4 min read

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

Business losses aren’t wasted. When a business generates a net operating loss (deductions exceed income for the year), the loss carries forward indefinitely and offsets future taxable income. For business owners in their startup years, years of heavy equipment investment, or economic downturns, the loss carryforward is a valuable asset that requires active management to maximize its benefit.

✓Key takeaway

Loss carryforward strategy principles:

Track every loss year precisely. Each year’s NOL is tracked separately because the 80% limitation applies to each year’s usage. A 2024 loss of $50,000 and a 2025 loss of $30,000 are two separate carryforwards ($80,000 total). They’re applied in order (FIFO: oldest first).
The 80% rule means 20% of income is always taxable. When using an NOL carryforward, only 80% of taxable income can be offset. If income is $100,000 and the available carryforward is $200,000, only $80,000 is used, leaving $20,000 taxable and $120,000 in remaining carryforward.
Losses carry forward indefinitely. There’s no time limit. A loss from a startup year can offset income 10 or 20 years later.
The excess business loss limitation (IRC 461(l)) caps current-year losses. Non-corporate taxpayers can only deduct business losses up to $305,000 (single) / $610,000 (MFJ) against non-business income. Excess losses become NOL carryforwards.
State NOL rules differ. Some states don’t allow NOL carryforwards, limit the carryforward period, or use different percentage limitations. State loss tracking must be done separately.

How does strategic timing maximize the carryforward?

Hypothetical example

Round numbers. A business generated $100,000 in losses during its first 2 years (startup costs, equipment, operating losses). In Year 3, the business becomes profitable with $150,000 in income.

Year 3 without planning:

Income: $150,000
NOL carryforward applied (80%): $150,000 x 80% = $120,000
But available carryforward is only $100,000, so the full $100,000 is used
Taxable income: $150,000 - $100,000 = $50,000
Remaining carryforward: $0

Year 3 with planning (accelerate deductions): The business owner makes $30,000 in equipment purchases (Section 179) and $23,500 in Solo 401(k) contributions before year-end.

Income before deductions: $150,000
Section 179: -$30,000
Solo 401(k): -$23,500
Adjusted income: $96,500
NOL carryforward applied (80%): $96,500 x 80% = $77,200
Taxable income: $96,500 - $77,200 = $19,300
Remaining carryforward: $100,000 - $77,200 = $22,800

The remaining $22,800 carryforward will offset 80% of income in Year 4. By taking additional current-year deductions (equipment and retirement), the business owner preserved $22,800 in carryforward while also investing in equipment and retirement savings. The total tax on $19,300 is approximately $2,300 (vs. $7,200 on $50,000 without planning).

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

There’s a balance here: using current-year deductions (which are 100% effective) can be more valuable than using the carryforward (which is 80% effective due to the limitation). The optimal strategy depends on the business owner’s current and projected tax brackets.

What is the difference between a tax deduction and a tax credit?

A tax deduction reduces your taxable income, which lowers your tax by the amount of the deduction multiplied by your marginal tax rate. A $1,000 deduction in the 24% bracket saves $240 in tax. A tax credit directly reduces your tax liability dollar for dollar. A $1,000 credit saves $1,000 regardless of your tax bracket. Some credits are refundable (you receive the excess even if your tax is zero), while others are non-refundable (they can only reduce your tax to zero). Credits are almost always more valuable than deductions of the same dollar amount.

What are the most important tax deadlines for small business owners?

The federal income tax return deadline depends on your entity type. Sole proprietors (Schedule C) and single-member LLCs file with Form 1040 by April 15. S-Corps (Form 1120-S) and partnerships (Form 1065) file by March 15, which is earlier because they issue K-1s that individual partners need for their personal returns. C-Corps (Form 1120) file by April 15. All deadlines shift to the next business day if they fall on a weekend or holiday. Extensions are available (6 months for most entities, 5 months for partnerships and S-Corps), but an extension to file is not an extension to pay. Estimated taxes are due quarterly on April 15, June 15, September 15, and January 15.

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Cite this page

Yarik Yarosh, CPA. "Using Business Losses Strategically: How Tax Loss Carryforwards Reduce Future Tax Bills." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/small-business-tax-loss-carryforward-strategy

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