The penny’s end and the sales tax ripple effect

The United States Mint's decision to discontinue production of the penny has sparked a surprising question for many tax professionals: What happens to the cents that appear in sales tax and cash drawers? Even though the penny will remain legal tender, many retailers are preparing to stop accepting them and round cash totals to the nearest nickel. For small businesses that handle daily cash transactions, this is more than just a pricing change; it's an accounting and compliance issue.

Where penny rounding matters for taxes

The tax type most affected is sales tax, because rounding happens at the register while the tax is still calculated to the cent. Federal income tax computation and reporting stay the same. The real work for practitioners will be helping clients implement consistent rounding procedures, update point-of-sale systems and prevent reconciliation drift.

Why does sales tax take the biggest hit?

Sales and excise taxes collected at the point of sale are the most exposed in a world without pennies. These taxes are calculated in real time, and state tax authorities generally expect taxes to be computed on the exact taxable selling price. Rounding should apply only to the final cash total. Early commentary from policy groups highlights the risk that businesses may inadvertently round the tax amount itself, which could result in undercollection or overcollection across thousands of transactions.

For many retail clients, the challenge isn't the math, but the systems. Point-of-sale programming, cash drawer balancing and sales tax return reporting all assume a precise, penny-based environment. Even a slight rounding difference can create confusion when totals collected don't match totals expected. Practitioners will want to verify how each client's system handles rounding, especially if they operate a business across multiple locations.

Example of how rounding affects tax and bookkeeping

A customer purchases a $4.99 item, subject to 6% sales tax. The sales tax is $0.30, bringing the total to $5.29. If the business rounds cash totals to the nearest nickel, the customer pays $5.30 in cash. The retailer must still report and remit exactly $0.30 of sales tax, because the tax is calculated on the original taxable sales price, with rounding applied only to the final cash total. This creates a $0.01 difference between the tax calculated and the cash collected, which must be tracked as either rounding income or a rounding expense, so the books reconcile to the sales tax return.

Why the penny’s disappearance won’t change federal income tax reporting

For income tax purposes, the removal of the penny has almost no effect. The IRS already allows whole-dollar reporting across returns and schedules. Taxpayers drop amounts under 50 cents and round up amounts of 50-99 cents. Because this practice is already baked into federal reporting, income tax computations aren't meaningfully affected by the penny's discontinuation.

Where rounding may be evident is in cash-heavy businesses. Daily rounding adjustments, if not tracked accurately, can impact bookkeeping and ultimately affect reported income. This won't change how federal tax is calculated, but it can affect the accuracy of the numbers used on the return.

Operational and compliance questions triggered by cash rounding

Retailers now face a set of practical decisions, including whether to round at the invoice level or at the individual line item. Most countries that eliminated their lowest denomination, such as Canada, Australia and New Zealand, round only the final total. U.S. businesses that adopt their own rounding rules without documenting them risk inconsistent practices that could become audit issues.

Electronic payments are another complication. Credit and debit card transactions, along with most digital payments, will still settle to the exact cent. That can create a two-total environment if a cash customer’s amount rounds up while a digital-payment customer pays the precise amount. Some states limit or regulate different pricing by payment method, so practitioners may want to confirm whether a client’s cash-rounding policy creates compliance or consumer-disclosure risk. In some states, including Wisconsin, consumer-protection rules limit charging more than the posted price, which means cash-rounding policies may also require clear disclosure to avoid pricing or consumer-law issues.

From an accounting standpoint, every rounded transaction creates a small difference. Businesses need a clear policy for tracking that amount as rounding income or a rounding expense so daily reconciliations and sales tax reporting stay aligned. Over time, consistent rounding in one direction could also raise consumer-protection questions or be raised during a sales tax audit.

Compliance issues to monitor as states respond

Because existing sales tax statutes assume the existence of cents, states are beginning to evaluate how penny elimination affects sales tax administration and cash rounding. Multistate groups, including the Streamlined Sales Tax Governing Board, have indicated that eliminating the penny does not change how sales tax is calculated, but that states will need to provide clear guidance to retailers on rounding cash transactions. For practitioners, the key question will be whether clients must continue to report and remit tax based on the precise calculated amount, even when customers pay a rounded cash total. Until consistent state guidance is issued, retailers may face uncertainty in how rounding affects reporting and remittance. There has been no official Executive Order or IRS guidance addressing the elimination of the penny. The change ultimately stems from a Treasury and U.S. Mint decision, leaving states to determine how rounding should be handled for sales tax purposes.

Another concern is whether cash rounding, when combined with card payments that still settle to the cent, creates pricing disparities that could be viewed as discriminatory if card and cash totals diverge. Retail clients should apply their rounding policy consistently, communicate it clearly to customers and document it for audit purposes.

What tax pros should tell retail clients about cash rounding

For small-office practitioners advising retail clients, the priority is to help businesses adopt a rounding process that's transparent, consistent and defensible during a sales tax audit. The most significant effects aren't on federal income tax, but on daily operations, reconciliation and state tax reporting.

Stay ready for changes in how businesses handle transactions

As states clarify their rules and retailers shift their systems, NATP chapters provide members with information. If you're looking for ongoing updates and tools that make these transitions easier, consider joining the NATP community.