SGOV is taxed as ordinary income at the federal level, and its monthly payouts are largely exempt from state and local income tax because the fund holds U.S. Treasury bills. The state exemption is the main tax advantage, but it isn’t applied automatically. You have to calculate the exempt portion yourself and enter it as a subtraction on your state return.
Federal Tax on SGOV Distributions
SGOV pays monthly distributions derived almost entirely from interest on its underlying Treasury bills. The IRS treats that income the same as interest from a savings account or a corporate bond: ordinary income, taxed at your marginal rate. For 2026, federal rates run from 10% on the first $12,400 of taxable income for single filers up to 37% on income above $640,600. Married couples filing jointly hit the 37% bracket above $768,700.1Internal Revenue Service. Revenue Procedure 2025-32
One detail trips people up. SGOV distributions land in Box 1a of your Form 1099-DIV as “ordinary dividends,” not on a 1099-INT. That happens because SGOV is structured as a regulated investment company, so all payouts flow through the dividend reporting framework regardless of their underlying character.2Internal Revenue Service. Instructions for Form 1099-DIV The distributions will not appear in Box 1b (qualified dividends), which means they do not qualify for the lower 0%/15%/20% rates that apply to qualified stock dividends. Every dollar is taxed at your full ordinary rate.
A small slice of each distribution can come from sources other than Treasuries, such as the repurchase agreements the fund uses for cash management. That portion is still ordinary income federally, and as covered below, it does not qualify for the state exemption.
The 3.8% Net Investment Income Tax
Higher-income investors owe an extra layer on top of the regular rate. The net investment income tax adds 3.8% when your modified adjusted gross income exceeds $200,000 for single filers or $250,000 for married couples filing jointly.3Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax Interest income is explicitly included in the definition of net investment income, so SGOV distributions count.
The surtax applies to the lesser of your net investment income or the amount by which your MAGI exceeds the threshold. These thresholds are set by statute and are not adjusted for inflation. A single filer earning $240,000 with $15,000 in SGOV distributions would owe the surtax on $15,000 (the lesser of the two figures), adding $570 in federal tax.4Internal Revenue Service. Net Investment Income Tax
The practical federal ceiling on SGOV income is therefore 40.8% for top earners: the 37% bracket plus the 3.8% surtax.
The State Tax Exemption on Treasury Interest
Federal law shields income from U.S. government obligations from state and local taxation. The statute is broad: states cannot impose any tax that requires Treasury interest to be factored into the calculation.5Office of the Law Revision Counsel. 31 USC 3124 – Exemption from Taxation For investors in high-tax states, this is the single biggest reason to hold SGOV rather than a money market fund or high-yield savings account.
The exemption does not apply automatically when you own an ETF. You hold shares of the fund rather than the Treasury bills directly, so it falls on you to calculate the exempt portion and subtract it on your state return. The fund publishes an annual figure showing the percentage of its distributions that came from U.S. government obligations. For SGOV that percentage tends to be very high, but never exactly 100% because of the small allocation to repurchase agreements and other cash instruments.
How to Calculate the Subtraction
The math is straightforward. Take your total distribution from Box 1a of Form 1099-DIV and multiply it by the fund’s reported U.S. government interest percentage. That product is what you subtract on your state return. If you received $5,000 in distributions and the fund reports 97% came from Treasuries, your state subtraction is $4,850.
Every state that taxes income has its own line for this adjustment, often labeled “subtraction modification” or “interest from U.S. obligations.” The fund’s percentage is typically posted on the fund manager’s website by late January or early February following the tax year. If you file before it publishes, you’ll need to wait or amend later.
What Can Block or Limit the Exemption
Some states impose a minimum asset threshold: the fund must hold at least 50% of its assets in U.S. government obligations at the end of each quarter to pass the exemption through to shareholders. SGOV comfortably clears that bar because it invests almost entirely in Treasury bills, but investors in other Treasury-focused funds with lower percentages should check.
Income from repurchase agreements does not qualify for the exemption even when the collateral is a government security. The exemption also does not cover capital gains from selling ETF shares. Only the interest portion of your distributions gets the state exclusion. About nine states have no personal income tax at all, so the exemption is irrelevant for residents there.
Capital Gains When You Sell Shares
Selling SGOV triggers standard capital gains rules. The taxable amount is the difference between what you received and your cost basis, and the rate depends on how long you held the shares.
- One year or less: Short-term gains are taxed at your ordinary income rate, the same rates that apply to SGOV distributions.6Internal Revenue Service. Topic No. 409, Capital Gains and Losses
- More than one year: Long-term gains get preferential rates. For 2026, the 0% rate covers taxable income up to $49,450 (single) or $98,900 (joint), the 15% rate applies above those amounts up to $545,500 (single) or $613,700 (joint), and 20% applies beyond that.1Internal Revenue Service. Revenue Procedure 2025-32
In practice, SGOV is designed to hold its share price near $100. The underlying Treasury bills mature within three months, which keeps price movement close to zero. Most of your return comes through the monthly distributions, not share appreciation, so capital gains or losses on a sale tend to be small.
If you do sell at a loss, that loss offsets capital gains from other investments dollar for dollar. Any remaining net loss can reduce your ordinary income by up to $3,000 per year ($1,500 if married filing separately), with unused losses carrying forward.6Internal Revenue Service. Topic No. 409, Capital Gains and Losses Capital gains from selling SGOV shares are fully taxable at both the federal and state level; the Treasury interest exemption does not reach them.
Watch the Wash Sale Rule
Investors who sell SGOV at a loss and buy it back quickly can trip the wash sale rule. If you repurchase SGOV or a substantially identical security within 30 days before or after the sale, the IRS disallows the loss.7Office of the Law Revision Counsel. 26 USC 1091 – Loss from Wash Sales of Stock or Securities The disallowed amount gets added to the cost basis of the replacement shares, so it isn’t permanently lost, but it can’t offset current-year gains.
This matters more than it sounds because investors often use SGOV as a cash parking spot, moving money in and out. To claim a loss cleanly, wait at least 31 days before buying back in, or switch to a different short-term Treasury ETF that isn’t considered substantially identical.
Reporting SGOV on Your Return
Your brokerage sends up to two forms depending on your activity:
- Form 1099-DIV reports all distributions from SGOV. The total appears in Box 1a. If your combined ordinary dividends and taxable interest across all accounts exceed $1,500, you’ll also file Schedule B with your Form 1040.8Internal Revenue Service. About Schedule B (Form 1040), Interest and Ordinary Dividends
- Form 1099-B comes only if you sold shares during the year. It reports proceeds and cost basis, which you use to complete Form 8949 and Schedule D.9Internal Revenue Service. 2025 Instructions for Form 8949
Neither form calculates your state subtraction. That number comes from the fund’s supplemental tax information, usually published as a document titled something like “U.S. Government Source Income Information” in the annual tax kit on the fund manager’s website. Multiply the percentage shown there by your Box 1a amount and enter the result as a subtraction on your state return. If your tax software asks whether any of your dividend income came from U.S. government obligations, that percentage is what it wants.