S-Corp Basis Tracking: Why It Matters and How to Calculate Shareholder Basis

S-Corp basis fundamentals:

What creates basis:

• Initial investment (cash or property contributed at FMV)
• Purchase price of stock acquired from another shareholder
• Additional cash contributions
• Share of income (ordinary income, separately stated items, non-separately stated income from the K-1)
• Share of tax-exempt income

What reduces basis (in this order per IRC 1368):

1. Distributions (first reduce basis, then taxable to the extent they exceed basis)
2. Nondeductible expenses (meals at 50%, penalties, life insurance premiums)
3. Losses and deductions (ordinary loss, separately stated items)

The ordering matters. Distributions reduce basis before losses. If a shareholder receives a $50,000 distribution and has a $30,000 loss, and their beginning basis is $60,000:

• Start: $60,000
• After distribution: $60,000 - $50,000 = $10,000
• Loss allowed: $10,000 (not the full $30,000)
• Suspended loss: $20,000

Basis cannot go below zero. Any loss exceeding basis is suspended and carried forward indefinitely until the shareholder increases their basis (through additional contributions or future income allocations).

Stock basis vs. debt basis:

• Stock basis comes from investment and income allocations
• Debt basis comes from DIRECT loans from the shareholder to the corporation (not bank loans the shareholder guarantees)
• Losses in excess of stock basis can be deducted against debt basis
• But distributions that exceed stock basis are NOT offset by debt basis (they become taxable capital gains regardless)

What happens when basis is exceeded:

Distributions exceeding stock basis:

• The excess is taxable as a capital gain (long-term if stock held more than 1 year)
• Distributions can only be tax-free to the extent of STOCK basis, not debt basis

Losses exceeding stock + debt basis:

• The excess is suspended and carried forward indefinitely
• The suspended loss is deductible in a future year when basis is restored (through income allocations or additional contributions)

Loan vs. contribution planning:

• A shareholder loan creates debt basis (allows loss deductions after stock basis is exhausted) but does NOT make distributions tax-free
• A capital contribution increases stock basis, which makes distributions tax-free
• The choice depends on whether the shareholder wants the money returned as a loan repayment or as a future distribution

Form 7203 reporting: All basis calculations are reported on Form 7203, attached to the shareholder’s Form 1040. The form requires beginning stock and debt basis, each adjustment (income, loss, deductions, distributions, contributions), ending basis, and the suspended loss calculation.

Common mistakes:

• Treating bank loans guaranteed by the shareholder as basis (they are not, per Rev. Rul. 75-144)
• Failing to reduce basis for distributions taken during the year
• Not tracking basis at all and discovering the problem when the business is sold
• Confusing inside basis (the corporation’s basis in its assets) with outside basis (the shareholder’s basis in their stock)