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Deducting Losses, Trapped Cash

By Jason Watson, CPA
Posted Sunday, December 29, 2024

Key Takeaways

  • You can only deduct business losses from an S Corp up to the amount of your shareholder basis (your invested amount plus profits). Partnerships follow a similar rule, but a partner’s share of business debt also counts toward basis.
  • Section 179 expensing is limited to your business income, so it cannot create a loss. Any unused deduction is carried forward to future years.
  • Bonus depreciation can create a loss, but losses beyond your basis are disallowed and carried forward.
  • Even if your business shows positive cash flow, that cash may be trapped if your basis is too low to allow distributions.
  • Depreciation deductions tied to financed equipment can create surprising limits on losses and distributions, making basis tracking essential.

With an S corporation or partnership you need sufficient shareholder / partnership basis in your business to deduct losses. For example, if you invested $10,000 into your business but the business lost $30,000, as an S Corp shareholder you can only deduct losses up to the amount of your shareholder basis (in this example, $10,000).

Think of Google. You invested $10,000 into Google stock and they go out of business, you only lose $10,000. Remember that with an S corporation you wear two hats- one as an employee, and one as an investor (shareholder).

Section 179 Expensing Limits

How does a loss in a small S corporation happen? A lot of small businesses are cash based and don’t have a lot of equipment (dentists are a common exception). However, for the sake of argument we will assume you bought a piece of equipment for $100,000 and borrowed $100,000 to pay for it. The equipment also qualified for Section 179 expensing deduction allowing you to deduct (or attempt to deduct) the full amount against business income. Great! The benevolent IRS king is alive and well.

Let’s assume that the business income prior to depreciation was $60,000 (and Section 179 expensing was $100,000). Here is the catch. Section 179 is limited to the business income of the S Corp, so it cannot create a loss. Your K-1 would show $60,000 of net business income and only $60,000 of Section 179 deduction. The two wash out, and your taxable income from the business is zero. $60k minus $60k = 0, even in Canada. Sorry Canada… just too easy to pick on.

The $40,000 remainder of the Section 179 deduction that was not used would be carried forward to future years. Yuck! Sorry, the once-benevolent IRS king is now asking you to be patient and wait. On the bright side, your shareholder basis stays at $10,000 since the income and the deduction offset each other.

Here is a table to demonstrate the depreciation conundrum more clearly. We love tables.

Taxable Income Prior to Section 179 60,000
Section 179 Expensing 100,000
Beginning Shareholder Basis 10,000
Net Biz Income (profit) on K-1, Box 1 60,000
Section 179 Expensing on K-1, Box 11 -60,000
Net Business Income on 1040 Tax Return 0
Ending Shareholder Basis 10,000
Section 179 Carryover, Form 4562 40,000

Bonus Depreciation Losses

Here is another example that shows a small but important difference between Section 179 and bonus depreciation. It uses the same facts as above, except this time you used bonus depreciation. Unlike Section 179, bonus depreciation can create a loss, but you can only deduct that loss up to your shareholder basis.

Starting Shareholder Basis 10,000
Net Income Before Depreciation 60,000
Bonus Depreciation (100%) 100,000
Net Income (loss) on K-1, Box 1 -40,000
Available Cash in Business 60,000
Allowed Losses -10,000
Ending Shareholder Basis 0
Disallowed Losses Carryover, Form 7203 30,000

Bonus depreciation is 100% for qualifying property acquired after January 19, 2025 under the One Big Beautiful Bill Act (OBBBA). The table above uses the full 100%.

What we are showing here are two things- first, your losses created by the bonus depreciation will be limited because of your shareholder basis. You started with $10,000 but didn’t have any net business income (profits). Rather, you had a $40,000 loss. $10,000 of this $40,000 was allowed and the remaining $30,000 will be carried forward to future years.

The second thing we are showing is how your cash is trapped. You had profits before bonus depreciation of $60,000 and for the sake of argument this also is your ending cash balance in your checking account. This cash is trapped since you cannot distribute it without creating a distribution in excess of basis, which is taxed as a capital gain.

A quick note on partnerships. These examples are S Corp examples. In a partnership or multi-member LLC, your share of the $100,000 equipment loan would generally add to your basis, so most or all of the bonus depreciation loss would be allowed. Same equipment, same loan, different result.

We will expand on this some more in a bit. The big takeaway is that business losses created by depreciation on a financed equipment purchase can be painfully and unknowingly limited. This is why WCG CPAs & Advisors tracks shareholder basis on Form 7203 every year for our S Corp clients, rather than reconstructing it when a loss or a large distribution shows up.

Wait! Looks like we talk about shareholder distributions and basis next. Yay!

Jason Watson, CPA, is a Partner and the CEO of WCG CPAs & Advisors, a boutique yet progressive tax, accounting and business consultation firm headquartered in Colorado Springs, Colorado. With 7 partners and 110 incredible professionals across offices in Colorado, South Dakota, Wyoming and India, WCG serves small business owners, real estate investors and taxpayers worldwide.

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Frequently Asked Questions

What is the shareholder basis in an S corporation?

It’s your investment in the business — including cash, property, and undistributed profits — that limits how much loss you can deduct.

How much of a loss can I deduct from my S corporation?

You can deduct losses only up to your shareholder basis; any excess loss carries forward to future years.

What is Section 179 expensing?

It lets you deduct the full cost of qualifying equipment in the year you purchase it, but deductions are limited by your basis.

What happens to unused Section 179 deductions?

Any amount you can’t deduct now is carried forward until you have enough basis to use it.

How is bonus depreciation different from Section 179?

Both accelerate deductions, but bonus depreciation is a percentage write-off (80% in 2023, 100% after Jan 19, 2025) and can apply even if you don’t elect Section 179.

Why can’t I take out all the cash my business earns?

Distributions can’t exceed your basis without triggering taxable income, even if your business checking account has plenty of cash.

What happens if my losses exceed my basis?

The excess losses are suspended and carried forward until you increase your basis through additional investment or future profits.

Why are losses from financed equipment purchases limited?

Because debt alone doesn’t always increase your basis unless you’re personally at risk, limiting how much of the depreciation you can deduct.

Can I plan ahead to avoid trapped cash?

Yes. Monitoring your basis throughout the year helps you manage distributions, deductions, and financing more efficiently.

Who can help me calculate my basis correctly?

A qualified CPA or tax advisor can track your basis and make sure your deductions and distributions are handled properly.

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