Sales tax · Missouri · St Louis County · rates effective October 1, 2026

Winchester, MO Sales Tax Rate: 8.238%

Buy something in Winchester, MO and 8.238% is added at the register. Of that, 4.225% goes to the state and 4.013% to local governments. Enter a purchase amount to see the dollars each authority gets.

Rates effective October 1, 2026, from the Missouri Department of Revenue, Sales/Use Tax Rate Tables (file dated October 1, 2026, read October 8, 2026). General merchandise rate; groceries, prepared food, lodging, vehicles and services can differ. Informational only — not professional tax advice.

Purchase amount

On a $100.00 purchase in Winchester, MO you pay $8.24 in sales tax, 8.238% in all, for a total of $108.24. Here is who gets each part.

Levied by	Rate	Tax on $100.00	In effect since
State of Missouri · state	4.225%	$4.22	2026-10-01
St Louis County (county and county-wide districts) · county	3.513%	$3.51	2026-10-01
Winchester (city) · city	0.5%	$0.50	2026-10-01
Combined rate	8.238%	$8.24

St Louis County

Methodology

How the combined rate is built

A sales tax rate is a sum. The state sets one rate for every sale in the state; the county, the city and any special district (transit authority, hospital district, improvement district) the address sits in each add their own. The combined rate is those components added together, and the page lists every one with the authority that levies it and the date it took effect, so the total can be checked line by line.

Combined rate  =  state rate + county rate + city rate + district rates
Tax            =  purchase amount × combined rate ÷ 100

Source and effective date

Every rate on this page comes from the Missouri Department of Revenue, Sales/Use Tax Rate Tables, the file dated October 1, 2026 with rates effective October 1, 2026, read on October 8, 2026. The file states one effective date for the whole table and none per jurisdiction, so every component is dated by it. Sales tax rates are not tax-year figures: they change on the first day of a quarter, most often January, April, July and October 1. The snapshot behind these pages is rebuilt from the DOR file on the fifth of those months.

MoDOR lists one combined sales rate per jurisdiction code. The county line is the county's rate less the state's 4.225% (it includes county-wide districts such as ambulance and fire districts); the city line is the city's rate less its county's.
Cities whose MoDOR rate is lower than their county row's (1) sit outside a county-wide district; their local rate is shown as one combined line rather than split.
The state rate of 4.225% is the general rate (3% general revenue, 1% education, 0.125% conservation, 0.1% parks and soils). Food is taxed at a reduced state rate.

Limitations

General merchandise only. Groceries, prepared food, lodging, motor vehicles, fuel, alcohol and services are taxed at different rates or not at all, and that differs by state and within Winchester, MO.
A ZIP code is not a jurisdiction. ZIP codes cross county, city and district lines, so a receipt's ZIP does not set the rate; the taxing jurisdictions the address sits in do. That is why there are no ZIP pages here.
Where the rate is measured. Missouri is an origin-based state: for sales inside the state, the rate at the seller's location applies, not the buyer's.
Special districts that cover part of a jurisdiction (an address-range improvement district, a transit area that stops at a road) are listed under "other rate areas" where the DOR lists them and left out where it lists them only by address.
Caps and thresholds (a surtax that applies only to the first $5,000 of an item, a maximum tax per sale) are not modeled; the split assumes the full rate on the full amount.

Last reviewed: October 2026. The state table was checked against each revenue department's page on October 8, 2026; the local snapshots are refreshed from the DOR files every quarter and checked by scripts/check-sales-tax.mjs before each deploy.

Frequently asked questions

What is the sales tax rate in Winchester, MO?

8.238% on general merchandise, as published by the Missouri Department of Revenue, Sales/Use Tax Rate Tables for rates effective October 1, 2026. It is the sum of 4.225% (State of Missouri), 3.513% (St Louis County (county and county-wide districts)), 0.5% (Winchester (city)).

How much sales tax is that on a $100 purchase in Winchester, MO?

$8.24 on a $100 purchase, for a total of $108.24. The calculator above splits any amount by the authority that receives each part.

Does the ZIP code on my receipt set the Winchester, MO rate?

No. Sales tax is set by the taxing jurisdictions the address sits in (state, county, city and any special district), and ZIP codes routinely cross those lines. A Missouri address in the same ZIP but outside the city limits can carry a different rate.

Does the 8.238% rate apply to groceries, restaurant meals, hotels and cars in Winchester, MO?

Not necessarily. The rate here is the general merchandise rate. Missouri, like most states, taxes some of those differently: groceries may be exempt or reduced, prepared food, lodging and vehicles often carry their own rates, and many services are untaxed. Check the Missouri Department of Revenue, Sales/Use Tax Rate Tables for the category.

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From the guides

How a Combined Sales Tax Rate Is Built, and Why the ZIP on Your Receipt Doesn't Set It

The rate at the register is a sum: state, county, city and district layers. Worked with the Texas Comptroller's Austin figures on a $1,250 purchase, and why ZIP codes don't decide it.

Read guide →