SGOV holds nothing but US Treasury bills maturing in 0 to 3 months, and Treasury interest is exempt from state and local income tax under federal law. That is the entire answer to "is SGOV exempt from state tax." The more useful question is which states that actually saves you money in, which states it changes nothing, and how the exemption shows up when you actually file.
Why Treasury Interest Is Exempt From State Tax
The exemption comes from 31 U.S.C. § 3124, a federal statute that bars states from taxing obligations of the US government. It codifies a doctrine called intergovernmental tax immunity: states cannot tax the federal government's own debt instruments, including Treasury bills, notes, and bonds. SGOV holds only T-bills, so nearly all of its monthly distribution is interest income covered by this exemption.
Two things this does not cover. First, federal income tax still applies in full; the exemption is state and local only. Second, the exemption covers interest income, not capital gains. If you sell SGOV shares for more than you paid because the share price moved, that gain is taxed like any other capital gain, state and federal. In practice this rarely matters for SGOV specifically, since a fund holding bills that mature in 0 to 3 months barely moves in price; nearly all of the fund's return comes through as exempt interest, not price appreciation.
The States Where This Actually Matters
The exemption is worth the most where state income tax rates are highest. On $10,000 of SGOV interest, the state tax avoided scales directly with the state's top marginal rate:
| State | Top marginal rate | Tax avoided on $10,000 interest |
|---|---|---|
| California | 13.3% | ~$1,330 |
| Hawaii | 11.0% | ~$1,100 |
| New York | 10.9% | ~$1,090 |
| New Jersey | 10.75% | ~$1,075 |
| Oregon | 9.9% | ~$990 |
| Minnesota | 9.85% | ~$985 |
| Massachusetts | 5% (+4% over ~$1M) | ~$500+ |
Massachusetts is worth a specific note since it comes up often: Massachusetts follows the same federal-obligations exemption under a state tax ruling (TIR 89-8), so SGOV's interest is exempt there too, at the state's 5% flat rate (9% on income above roughly $1 million after the 2023 surtax).
These are top marginal rates, not what everyone pays. Confirm your own bracket; state tax brackets and rates change, and this is general information, not a substitute for checking current rates or talking to a tax professional.
The Nine States Where It Doesn't Matter at All
Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming charge no state income tax, so the exemption has nothing to offset. In those states, choosing SGOV over a money market fund or a bank account comes down purely to yield, fee, and liquidity, the same comparison as any other cash option. One footnote: Washington taxes long-term capital gains above roughly $1 million a year at 7%, though this rarely touches a Treasury bill fund held for income rather than price appreciation.
High-tax state, meaningful SGOV exemption. No-income-tax state, the exemption is irrelevant and the decision is just yield versus fee versus convenience.
How This Shows Up on Your Tax Return
SGOV's distributions are reported to you on Form 1099-DIV, the same as any fund. Separately, the fund provider publishes a year-end tax supplement stating what percentage of that year's income came from US government obligations, since a fund's mix can shift slightly year to year even when it's meant to hold only Treasuries. You use that percentage to calculate your state exclusion when you file your state return.
This part matters: the exclusion is usually not automatic. Your broker's 1099 typically does not break out the state-exempt portion on its own; most states require you or your tax software to apply the percentage from the fund's supplemental tax statement manually. Skipping this step means paying state tax you did not actually owe.
SGOV vs a Money Market Fund: the State Tax Piece
A typical government money market fund holds a mix of Treasuries, repurchase agreements, and agency debt. The repo and agency portions generally do not qualify for the state exemption the way direct Treasury holdings do, so only part of the fund's payout is exempt, and that qualifying percentage can shift from year to year. SGOV, holding only Treasury bills, has close to its entire payout qualify every year. In a high-tax state, that gap can matter more than the one or two basis point fee difference between SGOV and a comparable money market fund.
The full pair-by-pair breakdowns, including fee, liquidity, and settlement mechanics beyond just tax treatment, live in SGOV vs money market funds and SGOV vs VMFXX. This piece is the deeper look at the tax mechanic itself.
SGOV and State Tax
- SGOV holds only Treasury bills, so its interest is exempt from state and local income tax under 31 U.S.C. 3124.
- The exemption covers interest, not capital gains from selling shares at a profit.
- Worth the most in California (13.3%), Hawaii (11%), New York (10.9%), New Jersey (10.75%), Oregon (9.9%), and Minnesota (9.85%). Massachusetts's 5% flat rate applies too.
- Irrelevant in the nine states with no income tax: AK, FL, NV, NH, SD, TN, TX, WA, WY.
- Not automatic on your state return. You apply the fund's year-end "% from US government obligations" figure yourself.
- Federal income tax applies regardless of state. This is general information, not personalized tax advice.
Common questions
Yes. SGOV holds only US Treasury bills, and interest income from Treasury securities is exempt from state and local income tax under 31 U.S.C. 3124, a federal law that bars states from taxing federal government obligations. Nearly all of SGOV's monthly distribution qualifies, since the fund does not hold repurchase agreements or agency debt the way many government money market funds do. This is general information, not tax advice; confirm your own situation with a tax professional.
SGOV's distributions are exempt from California's state income tax, because California follows the federal rule exempting Treasury interest from state taxation. Federal income tax still applies. For a California resident in the top 13.3% bracket, that exemption is worth roughly $133 per year in avoided state tax for every $10,000 of SGOV interest earned, compared to a fully taxable alternative.
No, for the same reason as California. New York's top marginal rate is 10.9%, and it follows the federal exemption for Treasury interest. A New York resident earning $10,000 in SGOV interest avoids roughly $109 in state tax that a non-Treasury cash alternative would owe.
Nearly, but with one carve-out. The distributions SGOV pays from Treasury bill interest are exempt from state and local income tax. If you sell SGOV shares for more than you paid due to price movement, that capital gain is not covered by the exemption and is taxed the same as any other capital gain, state and federal. In practice, SGOV's price rarely moves much since it holds bills maturing in 0 to 3 months, so this mostly affects the interest income, which is where nearly all of the fund's return comes from.
SGOV's monthly distributions are reported on Form 1099-DIV, and the fund provides a year-end tax supplement showing what percentage of the year's income came from US government obligations. You use that percentage to calculate your state exclusion when filing your state return; most states do not exempt it automatically, you or your tax software has to apply it. The income is fully taxable at the federal level regardless of state treatment.