The sales tax rate in the 63129 zip code is about 8.238 percent in most places, covering parts of Oakville and Mehlville in unincorporated St. Louis County, Missouri. Because tax boundaries don’t follow zip code lines, the exact rate at a given store depends on its street address, and some locations fall inside special districts that push the total higher.
How the 8.238 Percent Is Built
Every taxable purchase in Missouri starts with the statewide rate of 4.225 percent, set under Chapter 144 of the Revised Statutes. That state portion splits four ways: 3.0 percent to General Revenue, 1.0 percent to Education, 0.125 percent to Conservation, and 0.10 percent to Parks and Soils.1Missouri Department of Revenue. Sales/Use Tax
On top of the state portion, St. Louis County and its voters have approved several local sales tax levies that fund county services, public transit, and emergency communications. A half-cent sales tax approved by county voters helps fund the Metro public transit system, for example. Together, these local additions bring the rate in most of the 63129 area to roughly 8.238 percent. Local rates can change at the ballot box, so the breakdown shifts over time.
When the Rate Runs Higher
Certain commercial areas within or near 63129 may sit inside a Community Improvement District or Transportation Development District. These special districts can add their own sales tax on purchases made within their boundaries, funding things like parking garages, streetscapes, or road work.
The extra bite is not trivial. In some parts of the St. Louis region, overlapping CIDs and TDDs push the combined rate above 10 or even 11 percent. The 63129 area is mostly residential and less likely to carry aggressive district layering, but if you’re shopping in a newer commercial development, the rate on your receipt may be higher than the baseline. Retailers inside these districts are required to collect the higher rate.
How to Confirm the Rate for a Specific Address
To check the exact combined rate for any address in 63129, use the Missouri Department of Revenue’s address lookup tool at mytax.mo.gov. Because tax boundaries don’t follow zip code lines, this is the only reliable way to confirm your rate down to the penny.
What Gets Taxed and What Doesn’t
Missouri sales tax applies to most purchases of physical goods: electronics, furniture, clothing, appliances, and similar items. It also applies to certain services that many states leave untaxed, including utilities like electricity and gas, telecommunications, hotel rooms, restaurant meals, and admission to entertainment venues.2Missouri Revisor of Statutes. Missouri Code 144.020 – Rate of Tax
Most professional and personal services are not subject to sales tax. Hiring a plumber, an accountant, or a lawyer won’t trigger sales tax on the labor portion of the bill. The key distinction is between selling a physical product (taxable) and performing a service (generally not taxable). When a job involves both, like a contractor installing new cabinets, the materials are taxable even if the installation labor is not.
Groceries
Food purchased for home consumption gets a significant break. Under RSMo 144.014, the state rate on qualifying groceries drops to 1.225 percent instead of the full 4.225 percent.3Legal Information Institute. 12 CSR 10-110.990 – Tax-Sales of Food Qualifying groceries means products eligible for the federal SNAP program: raw ingredients, canned goods, bread, dairy, and similar staples. Prepared meals from restaurants and fast-food chains are taxed at the full rate.4Missouri Revisor of Statutes. Missouri Code 144.014 – Food, Retail Sales Of, Rate of Tax
Local county taxes still apply to groceries, so your total tax on a bag of groceries in the 63129 area will be lower than on a new TV, but it won’t be zero.
Fully Exempt Items
Some purchases carry no sales tax at all, state or local. Prescription medications, prosthetic devices, wheelchairs, hospital beds, home respiratory equipment, and other qualifying medical items are exempt from the full tax.5Missouri Department of Revenue. 12 CSR 10-110.013 Drugs and Medical Equipment
Two Annual Holidays Worth Timing Purchases Around
Missouri offers two windows each year when certain purchases are temporarily exempt from sales tax. Both apply in 63129.
Back-to-School Holiday
The back-to-school sales tax holiday runs from the first Friday in August through the following Sunday. In 2026, that’s August 7 through August 9. Qualifying purchases of clothing, school supplies, computers, and related items are exempt from all state and local sales tax during that window.6Missouri Department of Revenue. Back-to-School Sales Tax Holiday The exemption applies to items below price thresholds set by statute, so big-ticket electronics may not qualify. Check the Department of Revenue’s holiday page for the current year’s price limits before shopping.
Show Me Green Holiday
In April, Missouri waives state sales tax on Energy Star certified appliances during the Show Me Green holiday. The 2026 window runs from April 19 through April 25. Qualifying items include clothes washers, dryers, dishwashers, air conditioners, and refrigerators, with the exemption applying to the first $1,500 of each appliance.7Missouri Department of Revenue. Show-Me Green Sales Tax Holiday If you’ve been putting off replacing an aging appliance, timing the purchase saves you more than 8 percent on an often expensive buy.
Vehicles: Same Rate, Different Payment Process
Buying a car in or around 63129 triggers the full state rate of 4.225 percent plus applicable local taxes, calculated on the purchase price minus any trade-in allowance.8Missouri Department of Revenue. Motor Vehicle Titling In most cases you don’t pay this at the dealership. You pay it when you title the vehicle at the Department of Revenue.
You have 30 days from the date of purchase to title the vehicle and pay the sales tax. Miss that window and you’ll owe a $25 penalty on day 31, with another $25 for every 30 days you continue to wait, up to a maximum penalty of $200.9Missouri Department of Revenue. Buying a Vehicle On a $30,000 car, the combined sales tax alone runs roughly $2,400, so building this into your purchase budget matters.
Online and Out-of-State Purchases
When you buy something online or from an out-of-state retailer and no Missouri sales tax is collected, you still owe a consumer use tax. The rate matches the sales tax rate for the delivery address, so for a 63129 address it’s the same combined rate you’d pay in a local store.10Missouri Department of Revenue. Individual Consumer’s Use Tax
Most large online retailers now collect Missouri tax automatically. Missouri requires remote sellers with more than $100,000 in annual Missouri sales to register and collect.11Missouri Department of Revenue. Remote Seller and Marketplace Facilitator FAQs Smaller sellers, private-party purchases, and items bought while traveling out of state often slip through. If your untaxed purchases exceed $2,000 in a calendar year, you’re required to file an Individual Consumer’s Use Tax Return by April 15 of the following year. That $2,000 figure is a filing threshold, not an exemption. Once you cross it, you owe tax on the full amount, not just the excess.10Missouri Department of Revenue. Individual Consumer’s Use Tax