Missouri penny rounding law

Optional symmetric rounding of the final cash total after discounts and taxes. Vendors remit the full tax.

Updated October 30, 2026 · Based on official sources listed below

Optional

Businesses may round cash totals

August 28, 2026

In effect since

Customer sign required by law

Unrounded

Sales tax is figured on the pre-rounding price

Missouri cash rounding calculator

Enter a cash total, or item prices plus your sales tax rate. The result updates as you type.

State

What do you have?

The cash total Item prices + tax rate

Total due, including tax

Transaction

Cash sale Cash refund Card / EBT / check

Rounding methodOnly the methods the state allows are listed.

Cash handed over (optional)

Shows the change due.

Turn on JavaScript to use the calculator. The rule: totals ending in 1, 2, 6 or 7 cents round down to the nearest nickel; 3, 4, 8 or 9 cents round up.

How each ending cent rounds under this rule

…0¢…0¢same
…1¢…0¢−1¢
…2¢…0¢−2¢
…3¢…5¢+2¢
…4¢…5¢+1¢
…5¢…5¢same
…6¢…5¢−1¢
…7¢…5¢−2¢
…8¢…0¢+2¢
…9¢…0¢+1¢

The rounding rule

For cash transactions only, a vendor may round the total amount of sale to the nearest five cents (1, 2, 6, 7 down; 3, 4, 8, 9 up). Rounding applies only to the final total, after all items, discounts and taxes.

Who it applies to

Any vendor making a cash sale in Missouri. Pennies do not have to be unavailable first.

Customer notice

No customer sign is required.

Make a printable Missouri cash rounding sign.

Sales tax

The tax due on the sale must be remitted regardless of the method of payment. The Department of Revenue’s FAQ says to report and remit the exact tax. More on sales tax and cash rounding.

What is not rounded

Credit, debit and other noncash payments are not rounded.

Pennies, enforcement and safe harbors

The law does not address accepting pennies.

A vendor that rounds in good faith under the statute is not in violation of state or local requirements.

The law

Law	HCS HB 2819 (2026), RSMo § 144.285
Signed	July 13, 2026
Effective	August 28, 2026 (effective August 28, 2026)
Status	Law in effect

Checked against the sources below as of October 30, 2026. Compare other states in the state-by-state tracker.

Frequently asked questions

When did Missouri’s cash rounding law take effect?

August 28, 2026, Missouri’s standard effective date. The governor approved HB 2819 on July 13, 2026.

Can a Missouri vendor round each item price?

No. Rounding applies only to the final total of the transaction after all items, discounts and taxes.

Does Missouri's rounding apply to card payments?

No. Credit, debit and other noncash payments are not rounded. Only cash is rounded.