US Investment Income Tax: Rates, Reporting & FIRPTA Guide

Classification of Investment Income and Core Tax Rates

US tax legislation divides investment income into three primary types: Capital Gains, Dividends, and Interest Income.

Capital Gains Tax

For US tax residents, the capital gains tax rate depends on the asset holding period.

• Short-Term Capital Gains: When selling an asset held for 365 days or fewer, the profit is added to the investor's ordinary income. The rate is determined by the standard progressive federal income tax scale, falling into tiers of 10%, 12%, 22%, 24%, 32%, 35%, or 37%.
• Long-Term Capital Gains: Holding an asset for more than one year unlocks preferential federal rates of 0%, 15%, or 20%. The 0% rate applies to single filers with annual taxable income up to $48,350. The 15% rate applies to incomes between $48,351 and $533,400. Income exceeding $533,400 is taxed at the maximum federal rate of 20%.

In addition to federal rates, residents with a Modified Adjusted Gross Income (MAGI) exceeding $200,000 (single filers) or $250,000 (married couples filing jointly) are subject to the Net Investment Income Tax (NIIT) at a rate of 3.8%.

State taxes are levied separately. In states like California or New York, investment income is subject to additional local progressive tax scales (up to 13.3% in California). States such as Texas, Florida, Nevada, Wyoming, and Washington levy no state-level personal income tax.

For non-resident investors (NRA) physically present outside the US for more than 183 days during the tax year, capital gains derived from trading US equities and bonds on public exchanges (NYSE, NASDAQ) are exempt from federal capital gains tax (IRC Section 871(a)(2)).

Dividends

US tax residents classify dividend income into qualified and ordinary (non-qualified) dividends.

• Qualified Dividends: Taxed at preferential long-term capital gains rates (0%, 15%, or 20%). To qualify, the investor must hold the underlying common stock for more than 60 days within a 121-day period surrounding the ex-dividend date.
• Ordinary Dividends: Taxed as ordinary income under standard progressive federal rates (up to 37%).

For non-residents, the distinction between qualified and ordinary dividends does not apply. The default statutory withholding tax rate on dividends paid by US corporations to non-residents is 30%. Under an applicable Double Taxation Treaty (DTT) between the US and the investor's country of tax residence, this rate is reduced (typically to 15% for most treaty jurisdictions upon submitting Form W-8BEN).

Interest Income

Interest on corporate bonds earned by residents is included in ordinary income and taxed at standard rates (up to 37%). Interest derived from municipal bonds issued by states and local municipalities is exempt from federal income tax.

Special rules apply to non-residents: bank deposit interest and portfolio bond interest qualify for the Portfolio Interest Exemption under IRC Section 871(h) and are completely exempt from US withholding tax, provided the investor owns less than 10% of the voting stock in the issuing entity.

Taxation of Real Estate and Real Estate Investment Trusts (REITs)

Investments in US real estate—whether held directly or through publicly traded Real Estate Investment Trusts (REITs)—are subject to specialized legal mechanisms.

Asset Type / Vehicle	Taxpayer Category	Statutory Mechanism	Federal Tax Rate
Publicly Traded REIT	US Tax Resident	Ordinary Dividends / Section 199A	Up to 37% (with up to 20% Sec. 199A deduction)
Publicly Traded REIT	Non-Resident Alien (NRA)	Withholding Tax	30% (or applicable DTT rate)
Direct Real Estate (Rental)	Non-Resident Alien (NRA)	IRC Section 871(d) Election	30% on gross income OR progressive rate on net income
Real Estate Sale	Non-Resident Alien (NRA)	FIRPTA (IRC Sec. 1445)	15% withholding on gross sale price

Dividend distributions from REITs to US residents are generally classified as ordinary dividends rather than qualified dividends. However, they qualify for the Section 199A Qualified Business Income (QBI) deduction, allowing filers to deduct up to 20% of qualified REIT dividends from their taxable income base.

For non-residents, direct real estate transactions are governed by the Foreign Investment in Real Property Tax Act (FIRPTA). When purchasing real estate to generate rental income, foreign investors default to a mandatory 30% statutory withholding tax levied on gross rental revenue without the right to offset expenses.

To optimize tax liabilities, non-resident investors file an election under IRC Section 871(d). This reclassifies rental income as Effectively Connected Income (ECI) with a US trade or business. As a result, the investor pays standard progressive rates (10–37%) solely on net income, after deducting depreciation expenses (over a 27.5-year recovery period for residential property under MACRS), mortgage interest, property taxes, insurance, and maintenance costs.

Upon the sale of real estate by a non-resident, the purchaser acts as a withholding agent and must withhold 15% of the total (gross) purchase price under FIRPTA, remitting these funds directly to the IRS within 20 days. If the actual capital gains tax owed is lower than the withheld amount, the investor reclaims the overpayment by filing an annual tax return.

Capital Loss Offsetting and Carryforward Rules

US tax law permits investors to reduce taxable income through capital loss harvesting mechanisms.

• Inter-Category Loss Netting: Long-term capital losses first offset long-term capital gains. Short-term capital losses first offset short-term capital gains. Any remaining net loss in one category can then offset net gains in the other.
• Ordinary Income Deductions: If total capital losses exceed capital gains for the tax year, US residents can deduct up to $3,000 ($1,500 for married individuals filing separately) of net capital losses against ordinary income (wages, interest income).
• Loss Carryforward: Capital losses exceeding the $3,000 annual limit can be carried forward indefinitely to future tax years until fully offset.

When implementing loss harvesting strategies, investors must comply with the Wash-Sale Rule (IRC Section 1091). A tax loss cannot be claimed if an investor purchases a "substantially identical" stock or security—or acquires an option to do so—within a 61-day window: 30 days prior to the sale, on the date of the sale, or within 30 days after the sale. If violated, the disallowed loss is added to the cost basis of the newly acquired position, deferring the tax benefit until the asset is ultimately liquidated.

Compliance Procedures, Tax Forms, and Payment Deadlines

Maintaining tax compliance in the US requires the timely execution of regulatory forms and filing schedules.

Identification and Forms

Before executing financial transactions, investors establish their tax profile. US residents provide their broker or fund manager with Form W-9, supplying their Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN).

Foreign investors submit Form W-8BEN (for individuals) or Form W-8BEN-E (for entities). These forms certify foreign non-resident status and establish eligibility for reduced DTT withholding rates. Form W-8BEN remains valid through December 31st of the third full calendar year following the date of execution, requiring periodic renewal.

Annual Tax Reporting

Following the end of the calendar year, US brokers issue consolidated Form 1099 packages to resident investors (comprising 1099-DIV for dividends, 1099-INT for interest, and 1099-B for proceeds from securities transactions). Residents report these transactions using Form 1040, accompanied by Schedule D and Form 8949 to detail individual sales.

For non-residents, brokers issue Form 1042-S detailing US-sourced gross income and withheld taxes. Non-residents with income effectively connected to a US business (such as rental property income under an 871(d) election) must file an annual tax return using Form 1040-NR by April 15th of the following tax year.

Tax Payments and Estimated Taxes

The US operates on a Pay-As-You-Go tax model. If an investor's total annual tax liability exceeds withholding at the source by $1,000 or more, the taxpayer must make quarterly estimated tax payments using Form 1040-ES. Due dates for estimated tax installments fall on April 15th, June 15th, September 15th of the current tax year, and January 15th of the following year. Late or insufficient estimated payments trigger interest penalties under IRC Section 6654.