Do non-deductible expenses reduce S Corp basis?
John Thompson
Published Mar 29, 2026
Nondeductible expenses decrease basis because they are either not business related or are considered personal expenses. These items are not shown on your operating income statement for tax purchases and are shown on the pass-through IRS K-1 statement if they can be used on the personal return.
Are S corporations subject to at risk rules?
Similar to the basis rules for S corporations, shareholders are not at risk for any amounts they guarantee on behalf of the corporation.
Are unreimbursed S Corp expenses deductible?
An S-Corporation’s expenses are solely deductible at the corporate level. Therefore, unreimbursed expenses incurred by S-Corporation shareholders are not deductible.
What is a non tax deductible?
While deductible expenses reduce your tax liability, non-deductible expenses don’t impact your tax bill whatsoever. Some expenses are always deductible, others can never be deducted, and others still are only deductible under specific circumstances.
What are non-deductible expenses for an S corporation?
Nondeductible expenses that are not properly chargeable to capital accounts; and. Depletion deductions for oil and gas property that do not exceed the adjusted basis of such property allocated to the shareholder.
What prevents an S corporation shareholder from deducting losses from their corporations?
The basis rules apply to all S corporation shareholders. A taxpayer cannot take S corporation losses and deductions on their return to the extent they exceed the sum of their stock and debt basis in the corporation.
When do S corporation carry over nondeductible expenses?
When an S corporation has losses and deductions in excess of basis, some of which are nondeductible, noncapital expenses, will there be a carryover of the nondeductible items for purposes of reducing basis in a future year?
Can a family member increase an S corporation’s at risk basis?
However, shareholders may increase their at-risk basis by borrowing from a family member, as long as the debt is recourse and the family member is not a shareholder as well (Treas. Reg. § 1.465-8 (a) (1)). Treatment of activities of the S corporation. An activity is a trade or business conducted by the S corporation.
What are rules for adjustments to S corporation basis?
Sec. 1367 provides rules for adjustments to S corporation shareholders’ basis in their stock. Generally, basis is increased for items of income (including tax-exempt income) and the excess of deductions for non–oil and gas depletion over basis of the property subject to depletion.
How are losses and deductions allocated in an S corporation?
An S corporation’s losses and deductions are allocated among its shareholders according to their proportionate ownership of the S corporation’s stock. These losses and deductions reduce the shareholder’s basis in his or her stock or, if there is none, in the shareholder’s loans to the S corporation.