Brokerage fees do not all go in the same place on your federal tax return, and one major category no longer goes anywhere. Trading commissions adjust your cost basis and sale proceeds on Form 8949, which flows to Schedule D. Margin interest is claimed as an itemized deduction on Schedule A after you calculate the allowable amount on Form 4952. Advisory and management fees are not deductible on a federal return at all. That is the short answer to where to deduct brokerage fees on a tax return; the rest depends on which fee you paid and whether you itemize.
Trading Commissions Go Into Basis and Proceeds
Commissions you pay to buy or sell stocks, bonds, and other capital assets are never a standalone deduction. The commission on a purchase is added to your cost basis, and the commission on a sale is subtracted from your proceeds. That leaves a smaller gain or a larger loss, which is how the fee reduces your tax.1Internal Revenue Service. Instructions for Form 1099-B (2026)
On the forms, adjusted proceeds go in column (d) of Form 8949 and adjusted basis goes in column (e). Your broker sends Form 1099-B each year, with proceeds in Box 1d and basis in Box 1e. Brokers are required to include purchase commissions in the reported basis and to reduce reported proceeds by selling commissions, so at most major firms the 1099-B numbers already reflect what you paid.1Internal Revenue Service. Instructions for Form 1099-B (2026) Check the statements anyway. If a broker did not adjust for commissions, correct the basis on Form 8949 using the appropriate adjustment code.
Totals from Form 8949 carry to Schedule D, which separates short-term positions (held one year or less) from long-term positions (held more than one year). The net figure from Schedule D lands on Form 1040, line 7.2Internal Revenue Service. Schedule D (Form 1040) – Capital Gains and Losses Every commission you paid during the year is folded into that one number.
Margin Interest Goes on Form 4952, Then Schedule A
Interest on money you borrowed to buy taxable investments, typically margin interest from your brokerage, follows a separate path. It does not go into basis. You calculate the deductible amount on Form 4952 and then claim it as an itemized deduction on Schedule A, line 9.3Internal Revenue Service. Form 4952 – Investment Interest Expense Deduction
Two limits shape whether you actually get a benefit. First, the deduction cannot exceed your net investment income for the year. Net investment income generally includes taxable interest, non-qualified dividends, and short-term capital gains. Interest above that ceiling carries forward indefinitely until you have enough investment income to absorb it.4Office of the Law Revision Counsel. 26 US Code 163 – Interest
Second, you have to itemize. For 2026 the standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Unless your itemized deductions together (mortgage interest, state taxes, charitable contributions, and investment interest) clear that number, the Form 4952 deduction saves nothing.
One planning point worth knowing. On Form 4952 you can elect to treat qualified dividends and long-term capital gains as ordinary investment income, which raises your income cap and lets you deduct more interest. The trade-off is that the amounts you elect lose their preferential rates. Run the math both ways in a year when margin interest is high relative to ordinary investment income.
Advisory and Management Fees Are Not Deductible
If you pay a financial advisor a percentage of assets under management, a flat planning fee, an IRA custodial charge, or a subscription to investment research, there is no line for any of it on your federal return. The Tax Cuts and Jobs Act suspended miscellaneous itemized deductions starting in 2018. That suspension was set to expire after 2025. It didn’t. The One Big Beautiful Bill Act, signed on July 4, 2025, made the disallowance permanent.6Internal Revenue Service. One, Big, Beautiful Bill Provisions
The permanently non-deductible category covers investment advisory fees (assets-under-management percentages, hourly planning fees, retainer arrangements), custodial and account maintenance fees (annual IRA custodial charges, account service fees), and other investment expenses such as research subscriptions and the portion of tax preparation fees attributable to investment income. None of these appear anywhere on a 2026 federal return.
Keep the records anyway. A handful of states decouple from the federal rules and still allow investment expense deductions on the state return. Check your state’s instructions before you toss the paperwork.
What This Means for the 3.8% Net Investment Income Tax
Higher-income taxpayers pay a 3.8% Net Investment Income Tax on the lesser of net investment income or the amount their modified adjusted gross income exceeds $200,000 (single), $250,000 (married filing jointly), or $125,000 (married filing separately). These thresholds are fixed and do not adjust for inflation.7Internal Revenue Service. Topic No. 559, Net Investment Income Tax
Before the recent change, some taxpayers reduced their net investment income on Form 8960 by subtracting advisory fees, even though the same fees were not deductible on Schedule A. That workaround is gone. The IRS has confirmed that because miscellaneous itemized deductions are permanently disallowed for taxable income purposes, they also cannot be subtracted when calculating net investment income.8Internal Revenue Service. 2025 Instructions for Form 8960 – Net Investment Income Tax Investment interest expense, on the other hand, still reduces net investment income on Form 8960, matching its treatment on Schedule A.
A Narrow Exception for Traders in Securities
Taxpayers who qualify as traders in securities (not ordinary investors) can deduct many investment-related expenses as business expenses on Schedule C. Eligible costs include trading software and data subscriptions, home office expenses, margin interest, and professional fees such as accounting. The bar for qualifying is high. The IRS looks at trade frequency and dollar volume, holding periods, how much of your income comes from trading, and how much time you devote to it. Casual day trading generally does not qualify; the standard is closer to full-time occupation.9Internal Revenue Service. Topic No. 429, Traders in Securities
Even qualified traders cannot expense commissions on Schedule C. Commissions remain embedded in the gain or loss calculation for each trade, the same as they are for regular investors.9Internal Revenue Service. Topic No. 429, Traders in Securities
Records the 1099 Won’t Give You
Form 1099-B is the starting point for reporting sales, showing proceeds and cost basis for each transaction. Form 1099-DIV reports dividends, capital gain distributions, and foreign taxes paid.10Internal Revenue Service. About Form 1099-B, Proceeds from Broker and Barter Exchange Transactions Review both against your own records, especially for shares purchased years ago, transferred between brokers, or acquired through reinvested dividends, where reported basis may be incomplete.
Monthly and annual brokerage statements fill in what the 1099s leave out. Margin interest is the main example: it does not appear on the 1099-B, so you pull it from your statements or a year-end summary to complete Form 4952. Advisory fees are the same story. Even though the federal return has no place for them, you may still need the totals for a state filing or to document basis if fees were deducted directly from an account’s value.