# Missouri Sales Tax Calculator

URL: https://speedycalculator.com/calculators/finance/missouri-sales-tax/
Last updated: 2026-10-25

> The Missouri sales tax calculator works out the sales tax on a purchase in Missouri – the 4.225% state rate plus your local rate – and the total price, or removes the tax from a price that already includes it.

## Inputs

- Purchase amount
- Local sales tax rate (county and city, 0–6%) (%)
- The amount

## Results

- Combined sales tax rate
- Price before tax
- Sales tax amount
- Total price

## Formula

```
Combined rate = state rate 4.225% + local rate
Sales tax = price × combined rate
Price before tax = total ÷ (1 + combined rate)
```

## Explanation

Missouri's state sales tax is 4.225%, but cities, counties and special districts add their own, so total rates commonly range from about 6% to over 10% – around 9.7% in St. Louis city. Local rates change often – check your exact rate with the state revenue department for large purchases.

### How to use the Missouri Sales Tax Calculator

- **Purchase amount**
- **Local sales tax rate (county and city, 0–6%)**
- **The amount**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the purchase amount and your local (county and city) sales tax rate, and choose whether the amount includes tax.

### Tips

- Tax figures here are estimates for planning – your actual tax depends on credits, deductions and local rules.
- Check the tax year and filing status before you rely on a result.
- Use gross (before-tax) figures unless a field asks for take-home pay.
- When in doubt, confirm with the tax authority's own calculator or a tax professional.

### Common mistakes to avoid

- Confusing marginal and effective tax rates.
- Adding sales tax to a price that already includes it.
- Forgetting payroll taxes (Social Security and Medicare) on wages.

### Inputs explained

FieldWhat to enterPurchase amountAmount in your currencyLocal sales tax rate (county and city, 0–6%)In %The amountChoose one: Excludes sales tax, Already includes sales tax

### What each result means

- **Combined sales tax rate** = 4.225 + [Local sales tax rate (county and city, 0–6%)]
- **Sales tax amount** = [Price before tax]×[Combined sales tax rate]÷100
- **Total price** = [Price before tax] + [Sales tax amount]

### Example values

How the main result changes when **Purchase amount** changes and everything else stays at the example values above:

Purchase amountSales tax amount12510.28187.515.4225020.56312.525.737530.8450041.13

## Worked example

Inputs — Purchase amount: $250; Local sales tax rate (county and city, 0–6%): 4 %; The amount: Excludes sales tax.

Results — Combined sales tax rate = 8.225 %; Price before tax = $250.00; **Sales tax amount = $20.56**; Total price = $270.56.

## FAQ

**What is Missouri's sales tax rate?**
4.225% state plus local taxes, usually 6–10% in total.

**Are groceries taxed in Missouri?**
Food is taxed at a reduced state rate of 1.225% plus local taxes.

**Does Missouri tax online sales?**
Yes, since 2023 remote sellers collect Missouri use tax.

**What formula does the Missouri Sales Tax Calculator use?**
Combined rate = state rate 4.225% + local rate.


## Sources

- [Missouri Department of Revenue – Sales tax rates](https://dor.mo.gov/taxation/business/tax-types/sales-use/)