Key takeaways:
A coin changer is a machine that accepts paper bills or coins and automatically dispenses a specific denomination, most commonly quarters. The three main types are bill-to-coin changers, which convert paper currency to coins; coin-to-coin changers, which convert one denomination to another; and token changers, which dispense venue-specific tokens for use in arcades and entertainment centers. Laundromats, self-serve car washes, and similar coin-operated businesses rely on them to serve customers without on-site staff.
If you run a laundromat, car wash, or arcade, you already know the problem: customers need change, and if there’s no machine, or a machine that’s down or out of coins, it stops transactions cold. A coin changer solves that problem, but the differences between models matter when you’re deciding what to buy for your specific setup. At Standard Change-Makers, we’ve built currency change machines since 1955, and this guide covers what you need to know before you invest.
How a Coin Changer Works
Change machines have two core jobs: validate currency in, count coins out. On the input side, a bill acceptor reads each note using optical and magnetic sensors to verify the denomination, then signals the hopper to release the correct coin count into the output tray. The whole transaction takes a few seconds and requires no attendant.
The hopper is where your coin supply lives. It holds a single denomination (most often quarters) and counts coins electronically as they drop. Hopper capacity varies by model: standard hoppers handle moderate volume, while high-capacity versions mean fewer refill runs.
The outer cabinet protects both components. Commercial-grade change machines use welded steel construction with a secure locking system that keeps the bill box and coin supply secure. Both components are accessible from inside the cabinet, so refilling coins and pulling the bill cassette can be a one-person job.
Types of Coin Changers
Bill-to-coin changers accept paper currency and return coins in a specific denomination. This is the most common configuration for laundromats and car washes, where customers insert a bill and receive quarters to start a machine or pay for additional wash time. Most models accept bill denominations from $1 through $20, which covers the full range of what customers realistically carry.
Coin-to-coin changers accept one coin type and dispense another. A transit station or parking facility might return dollar coins as change, and customers who then need quarters for a nearby laundromat, vending machine, or parking meter have no way to make that conversion without one. The configuration is less common in the U.S., but very popular in Canada, where they use one-dollar (Loonie) and two-dollar (Twoonie) coin denominations.
Token changers work like bill-to-coin machines but dispense venue-specific tokens instead of coins. Arcades, game rooms, and family entertainment centers use them to manage play transactions without depending on coin circulation. Because the tokens only work on-site, operators maintain control over game economics without relying on quarters as the transaction currency. Customers can also pay with credit/debit cards in a change machine when it dispenses tokens.
Some locations pair coin changers with bill exchangers. A bill exchanger accepts a bill of one higher denomination and returns bills of another (for example, $20 for two $10 bills). This is useful for venues where customers need smaller bills but not coins, such as vending areas or transit stations with mixed payment equipment, and revalue stations where a customer would prefer not to put the higher denomination value on a loyalty or stored-value card.
Who Uses Change Machines?
Laundromats are the primary market for commercial change machines. Most run without on-site staff during all working hours, which means the change machine is the currency support available to customers throughout the operating day. According to the CLA, formerly the Coin Laundry Association, there are approximately 29,500 coin-operated laundromats in the United States, and as much as 79% depend on change machines to assist in every quarter transaction that happens in the store.
Self-serve car washes are another popular changer-using industry. Customers at in-bay, self-serve locations insert bills to get quarters or tokens, then use those quarters/tokens to activate the timer and extend their wash time. A self-serve bay that runs out of change mid-day simply can’t serve the customers who show up. Volume concentrates on weekends and during seasonal peaks, which makes capacity and machine reliability particularly important at these locations.
Arcades, game rooms, and family entertainment centers use token changers to issue venue-specific tokens for gameplay. Vending operators, parking facilities, transit locations, and specialty venues including zoos, museums, and campuses also rely on change machines and token dispensers wherever coin-operated payment is part of the customer experience. If customers can’t get the right denomination, the transaction doesn’t happen.
What to Look for When Buying a Change Machine
The first place that customers should begin is front-load or rear-load configurations. Do you have the wall space available with a secure area behind it that the public does not have access to, for a more secure rear-load machine? With a rear-load configuration, you can open the machine without anyone watching. A front-load machine is less secure because you open it in front of customers, and they can see how much money you are putting in or removing.
Coin output denomination needs to match your equipment. For laundromats and car washes, quarters are the most common. For arcades, you’ll need a token changer configured to your venue’s token specifications. Standard requires the diameter, thickness, and value of the token in order to build the hopper components properly. The output denomination is determined by what your coin-operated equipment accepts, so start there and work back to the machine.
Hopper capacity affects how often you need to replenish the machine. A high-volume laundromat may need coin replenishment every 2 to 4 days per week; a small parking facility might go several days between fills. Sizing the hopper to your daily transaction volume reduces the chance of running out during operating hours, and helps dictate how often you need to replenish. Some models include remote monitoring that sends an alert when coin levels drop to a preset amount, so you don’t have to be on-site to know when attention is needed.
Optional features are items that aren’t built into every model, but owners can add because they’re needed in the way they do business. Heater kits for car wash locations in colder climates. Medeco lock plugs are more secure and preferred in areas where security is a concern. Counters provide audit assistance for bills in and coins out. These are accessories that add to the reliability of the change machine or help the owner run their business more effectively.
Change machines are long-term assets. The right one can run for decades, and a cheaper machine you replace in five years ends up costing more. When you’re comparing options, factor in parts availability, phone support, and whether the manufacturer still services machines well into their life. Our coin changers and bill exchangers are backed by a service team that supports machines that have been in the field for 25 years or more.
Frequently Asked Questions
What’s the difference between a coin changer and a bill exchanger?
A coin changer accepts bills or coins and returns the equivalent value in a specific coin denomination, usually quarters. A bill exchanger accepts a bill of one denomination and returns bills of another (a $20 bill for two $10 bills, for example). Both machines serve self-service locations, but they solve different problems. Some operations deploy both: a coin changer for customers who need coins, and a bill exchanger for those who need smaller bills.
What coin denomination does a coin changer typically dispense?
Quarters are the most common output denomination for laundromats and car washes, where washers, dryers, and spray bays all run on quarters. Some locations configure their machines for dollar coins, or other denominations depending on their equipment. Token changers dispense venue-specific tokens rather than standard currency. The correct output denomination is determined by what your coin-operated equipment accepts, not by the change machine itself.
How often does a coin changer need to be refilled?
Refill frequency depends on your transaction volume and hopper capacity. A high-traffic laundromat will need more frequent coin replenishment, while a smaller location might go several days between fills. Choosing a machine with a hopper sized to your daily volume is the most practical way to keep the machine operational between your regular service visits. Remote monitoring features can alert you when coin levels reach a specified point, which reduces the chance of an unplanned outage during business hours.
Can a coin changer operate without an on-site attendant?
Yes. That’s the core design principle behind commercial change machines. They accept currency, dispense coins, and complete transactions without any staff involvement. Most installations at laundromats, car washes, and similar locations run entirely unattended throughout the operating day. Some models include remote monitoring that notifies you when bill cassettes are low or when the machine goes out of service, so you can respond quickly without being present at the location.
Choose the Right Change Machine for Your Location
A coin changer is the perfect solution for providing change without an attendant and keeping a self-service business running smoothly. Whether you have a laundromat, car wash, or a token changer for an arcade, you need the right coin changer. We offer a coin changer for almost any automated, self-service, or cash-heavy business where customers need exact change to operate equipment.
The right coin changer comes down to your space, your security needs, and what you’re dispensing. Contact the sales team to learn more about the options.