Is VMSXX taxable?
VMSXX is free of federal tax and of the 3.8% on investment income. Washington, DC and North Dakota leave it alone; every other state with an income tax taxes all of it.
Vanguard Municipal Money Market Fund
A national municipal money market fund: its income is interest on state and local bonds from across the country.
- Yield
- 3.34%, the 7-day SEC yield for October 1, 2026, after the fund’s expenses
- Federal
- Free of federal tax and of the 3.8% on investment income.
- States
- The 9 states with no income tax (Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington and Wyoming) take nothing. North Dakota and Washington, DC leave all of it alone. Every other state with an income tax taxes all of it.
- New York City
- Treats it the way the state does.
What it is worth after tax
The tax-equivalent yield: what a savings account, taxed by everyone, would have to pay to leave you as much as VMSXX does. Each with $100,000 in cash.
Work out yours with your own income and state.
| Where | Single, $60,000 | Single, $150,000 | Married, $400,000 |
|---|---|---|---|
| Texas | 3.80% | 4.39% | 4.63% |
| California | 3.83% | 4.54% | 4.82% |
| New York | 3.83% | 4.48% | 4.76% |
| New York City | 3.85% | 4.55% | 4.85% |
VMSXX keeps 3.34% in Texas, 3.03% in California, 3.14% in New York and 3.01% in New York City for a single filer earning $150,000 a year.
Where it pays the most today
Of the six Vanguard funds here, after every tax, on the yields for October 1, 2026.
- Single, $60,000
- Nowhere today.
- Single, $150,000
- Everywhere but California, New York and New York City.
- Married, $400,000
- Everywhere but California, New York and New York City.
Asked about VMSXX
Is VMSXX taxable?
VMSXX is free of federal tax and of the 3.8% on investment income. Washington, DC and North Dakota leave it alone; every other state with an income tax taxes all of it.
What is VMSXX's tax-equivalent yield?
It depends on your bracket and your state. On its 3.34% yield for October 1, 2026, for a single filer earning $150,000 a year it is 4.39% in Texas, 4.54% in California, 4.48% in New York and 4.55% in New York City: what a savings account taxed by everyone would have to pay to leave as much.
Is VMSXX the best money market fund?
Of the six Vanguard funds here, it leaves a single filer earning $150,000 a year the most after tax everywhere but California, New York and New York City on today's yields. The answer moves with yields and with your bracket.
The yield is from Vanguard’s page for VMSXX, collected twice a day.
Checked on September 30, 2026 against Net investment income tax, ICI, state taxation of state and local obligations (2023), Rev. Proc. 2025-32 and every state's published schedule. An estimate for your records, not tax advice.
Put more back in your pocket.
Four questions find the fund that leaves you the most. Reimburse writes when a different one starts paying you more.