Form FTB 3805V: California Net Operating Loss (NOL) Computation and Disaster Loss Limitations

Form FTB 3805V is the California Franchise Tax Board’s worksheet for calculating a Net Operating Loss (NOL) and applying disaster loss limitations. It’s used by individuals, estates, and trusts whose deductible business or casualty losses exceed their income for the tax year. Rather than letting that loss disappear, California allows taxpayers to carry it forward — and in some disaster situations, carry it back — to offset income in other years.

If you run a sole proprietorship, hold a partnership or S corporation interest that passes through losses, or you’re the trustee of an estate or trust that experienced a significant financial setback, this is the form that turns that loss into a usable tax benefit on your California return.

Who Needs to File Form 3805V

You generally need Form 3805V if any of the following apply:

• Your allowable deductions for the year exceeded your gross income, creating a net operating loss under California law.
• You want to carry over an NOL from a prior year to reduce current-year taxable income.
• You suffered a loss in a federally or state-declared disaster area and want to claim it as a disaster loss, which may qualify for special carryback treatment.
• You’re an estate or trust reporting an NOL that passes through to beneficiaries or is retained at the entity level.

Note that California doesn’t always conform to federal NOL rules. The state has its own limitations on carryover periods and, in certain years, has suspended NOL deductions for higher-income taxpayers or businesses above certain income thresholds. That’s why this form exists separately from anything you’d file with the IRS — the computation and carryover periods can differ significantly from federal Form 172 or Schedule A calculations.

When to Use It

You attach Form 3805V to your California Form 540, 540NR, or the appropriate fiduciary return (Form 541) for any year in which you’re claiming a current NOL deduction, computing a new NOL to carry forward, or claiming a disaster loss. The form has separate sections: one for computing the current-year NOL, one for tracking carryovers from prior years, and one specifically for disaster losses tied to a qualifying disaster declaration.

Disaster losses get special treatment because California sometimes allows a carryback (usually to the preceding tax year) instead of only a carryforward, which can generate a faster refund if you paid tax in that earlier year. The form walks you through electing this treatment and calculating the amount eligible for carryback versus carryforward.

How to Fill It Out

The PDF is a fillable AcroForm, so you can type your figures directly into the fields before printing or attaching it to an e-filed return. In broad terms, you’ll need:

• Your California adjusted gross income and itemized or standard deduction figures for the loss year.
• Details on the source of the loss — business, disaster, or a combination — since California applies different percentage limitations depending on the type.
• Records of any NOL carryovers from previous years, including the year generated and amount already absorbed.
• For disaster losses, documentation identifying the disaster (name and declaration date) so the FTB can verify eligibility.

Because the math involves modifying federal AGI figures with California-specific adjustments, many filers work through this alongside their federal NOL worksheet rather than in isolation. If you’re unfamiliar with how state tax credit and loss forms generally work across different states, it can help to see how other states structure similar relief mechanisms — for instance, New York’s Youth Jobs Program Tax Credit (Form IT-635) or its Empire State Jobs Retention Program Credit (Form IT-634) follow a comparable logic of matching a specific worksheet to a specific type of tax relief, even though the underlying rules differ from California’s NOL provisions.

The current version of Form 3805V is available directly from the Franchise Tax Board’s website as a downloadable, fillable PDF. Because California updates its NOL suspension rules and carryover percentages periodically based on state budget conditions, it’s worth confirming you’re using the version that matches your specific tax year before submitting it with your return.