Form 6198 explained: How at-risk rules limit your business losses

Your business lost money this year. That is painful, but you expected at least one silver lining: deducting the loss against your other income to reduce your tax bill. A $40,000 business loss should offset $40,000 of other income, saving you $10,000 or more in taxes.

Then your accountant delivers unexpected news. Your loss is limited. You cannot deduct the full amount. The reason involves something called "at-risk rules," and suddenly, a tax benefit you counted on has evaporated.

The at-risk rules explained in this guide will help you understand why losses get limited, how to calculate your at-risk amount, and how Form 6198 determines what you can actually deduct.

At-risk rules limit losses to amounts you could actually lose

The at-risk rules exist to prevent a specific type of tax shelter abuse. Before these rules, taxpayers could invest in activities using borrowed money they were not personally liable for, generate paper losses, and deduct those losses against other income. The economic risk fell on the lender, but the tax benefit went to the investor.

Congress responded with at-risk rules that limit loss deductions to amounts the taxpayer genuinely has at economic risk. If you could walk away from an investment without personal liability, you could not deduct losses funded by that protected position.

1. The rules apply to most business and investment activities. Any activity engaged in as a trade or business or for the production of income is subject to at-risk limitations. This includes sole proprietorships, partnerships, S corporations, and certain closely held C corporations. Only a few activities, primarily real estate with qualified non-recourse financing, have exceptions.

2. At-risk is one of several loss limitation layers. When you have a business loss, the tax code applies multiple limitations in sequence.

• First, you must have a sufficient basis in the activity.
• Second, the at-risk rules limit losses to your at-risk amount.
• Third, passive activity rules may further limit losses from passive activities.
• Fourth, the excess business loss limitation caps total business losses against non-business income.

Your loss must survive each layer to be fully deductible. Passive activity rules may still limit a loss that passes the at-risk test. Understanding where in this sequence your loss gets stopped helps you plan accordingly.

Your at-risk amount determines the maximum deductible loss

The at-risk limitations calculation centers on determining how much you actually have at risk in the activity. This is not the same as your tax basis, though the concepts overlap.

1. Amounts at risk include cash and the adjusted basis of property contributed. If you invested $50,000 cash in a business, that $50,000 is at risk. If you contributed equipment with an adjusted basis of $20,000, that amount is at risk. Your personal funds and property form the foundation of your at-risk amount.

2. Recourse debt increases your at-risk amount. When you borrow money and are personally liable for repayment, the borrowed funds are at risk. A business loan you personally guaranteed adds to your at-risk basis because you could actually lose that money if the business fails and the lender comes after you.

3. Non-recourse debt generally does not create an at-risk basis. This is the critical distinction. If you borrowed money secured only by property and have no personal liability, those borrowed funds are not at risk. You could walk away from the property and owe nothing beyond what the lender recovers from the collateral. Since you cannot personally lose that money, you cannot deduct losses funded by it.

4. Your at-risk amount changes over time. It increases when you contribute more cash or property, when the activity generates income, or when you take on additional recourse debt. It decreases when you withdraw funds, when losses are allowed, or when recourse debt is reduced. Tracking these changes year over year is essential for accurate loss deduction limits.

5. The at-risk amount can go negative. If you receive distributions or have debt converted from recourse to non-recourse, your at-risk amount can drop below zero. A negative at-risk amount means previously allowed losses are "recaptured" as income in the current year.

Passive activity vs at-risk: Understanding the difference

Taxpayers often confuse at-risk rules with passive activity rules because both can limit losses, the distinction between passive activity and at-risk matters for understanding which limitation applies and how to address it.

1. At-risk rules focus on economic exposure. The question is whether you could actually lose money. If your investment is protected by non-recourse financing or third-party guarantees, you lack genuine economic risk.

2. Passive activity rules focus on participation. The question is whether you materially participate in the activity. Even if you have significant amounts at risk, losses from activities where you do not materially participate may be limited to offsetting only passive income.

3. The rules apply in sequence. At-risk limitations apply first. Only losses that survive the at-risk test are then subject to passive activity analysis. A $50,000 loss from a passive activity where you have only $30,000 at risk is first limited to $30,000 by at-risk rules. The remaining $30,000 is then analyzed under passive activity rules.

For professional service firm owners who actively work in their businesses, passive activity rules rarely apply because material participation is usually present. But at-risk rules still apply if the activity is financed with non-recourse debt.

Form 6198 calculates and tracks your limitation

The Form 6198 instructions walk through calculating your at-risk amount and determining how much loss is deductible.

• Part I identifies the activity. Enter the description of the activity generating the loss. If you have multiple activities, you may need separate Forms 6198 for each unless they can be aggregated.
• Part II calculates the current year-at-risk amount. This section tallies your investment at risk: cash invested, adjusted basis of property contributed, amounts borrowed for which you are personally liable, and your share of qualified non-recourse financing for real estate activities. It subtracts amounts that reduce your at-risk amount, such as distributions and non-recourse liabilities.
• Part III calculates the deductible loss. Compare your loss from the activity to your at-risk amount. Your deductible loss is the lesser of the two. If your loss exceeds your at-risk amount, the excess is suspended and carried forward to future years when your at-risk amount increases.
• Part IV tracks amounts not at risk. This section documents borrowed amounts where you lack personal liability, amounts protected by guarantees from related parties, and other amounts not genuinely at risk.
• Carryforward losses get priority. Suspended losses from prior years are deducted before current year losses when the at-risk amount becomes available. Track these carryforwards carefully because they can accumulate over multiple years.

When Form 6198 is required

You must file Form 6198 in specific circumstances.

1. File when you have a loss, and your at-risk amount is limited. If your loss exceeds your at-risk amount, the form documents the limitation and calculates the allowed deduction.

2. File when you have a prior year carryforward. Even if the current year is profitable, you need to track and potentially utilize prior suspended losses.

3. File when your at-risk amount may be negative. If distributions or debt restructuring could create recaptured income, the form calculates the amount.

4. For activities where you have substantial at-risk amounts relative to any losses, you may not need to file Form 6198. But if the activity involves significant debt financing, even one year of losses may require the form.

Managing at-risk limitations strategically

The at-risk rules are not just compliance requirements. They create planning opportunities.

1. Structure debt to maximize at-risk basis. Personal guarantees on business loans increase your at-risk amount. If you anticipate losses, ensuring that the debt is recourse rather than non-recourse preserves your ability to deduct those losses.

2. Contribute cash before year-end. If you have suspended losses from prior years and contribute additional capital, the increased at-risk amount allows previously suspended losses to become deductible.

3. Track the at-risk amount annually. Do not wait until you have a loss to calculate your at-risk basis. Maintaining a running calculation helps you anticipate limitations and plan contributions or debt restructuring accordingly.

The at-risk rules add complexity to loss deductions, but they follow logical principles. You can only deduct losses up to what you could actually lose. Keep track of your at-risk amount, file Form 6198 when required, and suspended losses will eventually become deductible as your at-risk basis grows.