IRC Section 704(d) limits partner loss deductions to the partner's adjusted basis in the partnership interest. A partner with $500,000 in partnership interest basis cannot deduct more than $500,000 in partnership losses, even if the partnership realizes larger losses. This limitation prevents partners from claiming losses beyond their economic investment. Additionally, IRC Section 465 (at-risk rules) further limits losses to the amount "at risk" in the activity (generally the partner's basis plus any personal liability on partnership debt). A limited partner with $500,000 in capital contribution basis and $5 million in recourse partnership debt is at-risk only in the amount of the $500,000 (limited partners have no personal liability for recourse debt). IRC Section 469 (passive activity loss rules) layers on top of Sections 704(d) and 465, potentially limiting losses further if the activity is passive.
Basis Limitation Under Section 704(d)
Section 704(d) contains the fundamental rule: loss deductions are limited to basis. Basis begins with the partner's initial capital contribution, increases by additional contributions and allocated partnership income, and decreases by distributions and allocated partnership losses. If a partner invests $500,000 in a real estate partnership and the partnership allocates $150,000 in losses in year 1, the partner can deduct $150,000 (basis remains $350,000). If the partnership allocates $400,000 in losses in year 2, the partner can deduct only $350,000 (the remaining basis), and the excess $50,000 loss is suspended. The suspended loss carries forward to future years when basis is restored (through additional contributions or allocated income). This basis limitation applies to all partnership structures: LLC taxed as partnership, S-Corporation, limited partnership, general partnership.
At-Risk Limitations Under Section 465
IRC Section 465 imposes at-risk limitations on top of Section 704(d) basis limitations. Generally, losses are deductible only to the extent the partner is "at-risk." At-risk means the partner has economic investment that could be lost if the activity fails. A limited partner with $500,000 equity investment is at-risk in the amount of $500,000. Nonrecourse debt (debt for which the partner is not personally liable) does not increase at-risk amount. If a real estate partnership borrows $3 million in nonrecourse construction financing, limited partners do not increase their at-risk basis by the debt amount. However, recourse debt (for which the partner is personally liable, or for which the partnership is liable and is traceable to the partner's economic interest) does increase at-risk amount. The distinction between recourse and nonrecourse debt becomes critical: a limited partner with $500,000 equity and $5 million in recourse debt guaranteed by the limited partner has $5.5 million at-risk (equity plus recourse debt guarantee).
Passive Activity Loss Limitations Layering
IRC Section 469 creates a third layer of limitations on partnership losses. Even if a partner's loss is within basis (Section 704(d)) and at-risk limits (Section 465), if the activity is passive, the loss is limited to passive income ($25,000 annual special allowance if AGI is below $100,000, or full deduction if the taxpayer qualifies for Real Estate Professional Status under Section 469(c)(7)). A limited partner with $500,000 basis and $5 million at-risk might deduct $100,000 in losses (within Section 704(d) and Section 465), but if the activity is passive and the partner has no passive income, the loss is limited to $25,000 (less the $25,000 cap, assuming AGI qualifies). The remaining $75,000 in losses suspends under Section 469 passive activity loss rules.
Basis Ordering Rules for Deductions and Distributions
Basis is reduced by losses in the order they are applied to the partner. (1) Losses deducted under Section 704(d) reduce basis first, (2) Then nondeductible losses (suspended under Section 704(d) for lack of basis) are tracked separately, (3) Distributions reduce basis (generally at capital account value), (4) Contributed property retains its built-in gains/losses separately under Section 704(c). A partner with $500,000 initial basis who receives a distribution of $100,000 has $400,000 remaining basis. If the partnership allocates $300,000 in losses, the partner deducts the full $300,000 (basis is $100,000 after distribution, which is sufficient to absorb the $300,000 loss). Actually, the partner can deduct only $400,000 in losses maximum (the remaining basis after distribution), so the partner deducts $300,000 and retains $100,000 in remaining basis. The order matters for tax planning: distributions should be coordinated with loss allocations to ensure sufficient basis is available.
Restoration of Basis Through Income Allocation
Basis is restored when the partnership allocates income to the partner. If a partner has a $100,000 suspended loss (due to insufficient basis in year 1), and the partnership allocates $150,000 in income in year 2, the partner's basis is first increased by the $150,000 income allocation, then the $100,000 suspended loss becomes deductible, and the partner retains $50,000 in remaining basis. The restoration of basis creates opportunity for loss utilization in future profitable years. Real estate partnerships often have cyclical income/loss patterns: development phase (losses), hold phase (income), sale phase (capital gains). Planning around basis limitations involves timing property acquisitions, distributions, and income recognition to maximize available basis when losses are deductible.
Guarantees and Recourse Debt Basis Increase
Under IRC Section 752, a partner's basis increases by the partner's share of partnership liabilities. Recourse liabilities (for which the partner is personally liable) increase the partner's basis by the full amount of the liability. Nonrecourse liabilities increase basis by the partner's share of equity in the property securing the debt. If a partnership borrows $1 million in recourse debt that is guaranteed by the general partner, the general partner's basis increases by $1 million. Limited partners do not increase basis for recourse debt unless they are personally liable. This creates planning opportunity: a general partner can increase basis (and loss deduction capacity) by guaranteeing partnership debt. However, guarantee obligations create personal liability; the general partner must be comfortable with potential personal liability before guaranteeing debt.
Taxable Income vs. Book Income and Basis Tracking
Partners must track two separate income/loss measurements: (1) Taxable income/loss (for income tax reporting, allocated via K-1), (2) Book income/loss (for partnership financial statements, reflected in capital accounts). These can diverge significantly due to depreciation (taxable loss but no book loss), capital gains (taxable gain, book gain), and Section 704 special allocations. A partner's basis is not the same as capital account; basis is tracked separately and is used for loss limitation purposes. The partnership should maintain a basis schedule for each partner showing: initial basis, adjustments for income/losses, adjustments for distributions, and current basis. Annual reconciliation ensures accurate tracking and prevents IRS disputes on basis limitations.
Disposition and Loss Deduction Trigger
When a partner disposes of (sells) the entire partnership interest, any suspended losses become deductible in the year of disposition. A partner with $100,000 in suspended losses (due to basis limitations) sells the partnership interest and recognizes capital loss. The suspended $100,000 losses become deductible in the year of sale, potentially creating a net loss for the year. This creates tax planning opportunity: coordinate sale of partnership interest with other income or gains to utilize suspended losses. A partner expecting significant capital gains in a sale transaction can deduct accumulated suspended losses against the gains.