Set up a payment method before the fair starts
You need at least one working payment method in place before you arrive at the fair. The most common setup is a mobile card reader—a small device that plugs into your phone or tablet and lets customers swipe, insert, or tap their card. Square, PayPal, Stripe, and Toast all make these readers and charge a percentage of each transaction (usually 2.6% to 3.5% plus a small per-transaction fee). The reader itself costs $20 to $50 upfront.
If you cannot afford a card reader or do not want to use one, bring cash and make change yourself. Many vendors at fairs still operate this way. You will need a cash box, a calculator, and enough small bills and coins to make change for the first few customers—typically $100 to $200 in small denominations.
Some fairs require you to use their payment system or a pre-approved processor. Check your vendor agreement or call the fair organizer before you buy anything. A few large fairs run their own payment network and take a cut of every transaction, whether you use their system or your own.
Key Takeaways
- Mobile card readers (Square, PayPal, Stripe) are the fastest way to accept cards at a fair, but they charge 2.6% to 3.5% per transaction plus a small flat fee.
- Cash is still a valid option if you bring a cash box, calculator, and at least $100 in small bills to make change.
- Check your vendor agreement to see if the fair requires you to use a specific payment processor or forbids certain methods.
- Test your card reader and internet connection at home before the fair; many fairgrounds have weak or spotty Wi-Fi.
- Keep receipts, transaction records, and cash reconciliation notes for your own records and for tax reporting.
Understand what internet and power you will have
Most mobile card readers need either a working internet connection or Bluetooth to your phone. If the fairground has Wi-Fi, test it yourself before the fair day—many fairs advertise Wi-Fi but the signal is weak in vendor areas or drops during peak hours. If you cannot rely on the fair's Wi-Fi, bring a mobile hotspot (a separate device that uses your phone's data plan) or use your phone as a hotspot for your tablet or reader.
Power is another problem. If you are using a tablet or phone to process payments, bring a portable battery pack rated for at least 10,000 mAh so you can recharge during the day. Some fairs provide power outlets at vendor booths; others do not. Ask the fair organizer in advance. If outlets are available, bring a power strip and a long extension cord.
Offline mode is a backup worth knowing about. Square, PayPal, and Stripe all allow you to take payments without an internet connection, but the transaction will not go through until you reconnect. The customer's card is not charged until the connection is restored, so you cannot rely on this for immediate confirmation. Test offline mode at home before the fair so you know how it works.
Decide how to display prices and handle cash flow
Print price tags or a price list and tape them to your table or display. Do not rely on telling customers the price verbally—it slows down transactions and creates confusion. If you are selling multiple items at different prices, a laminated price sheet or printed menu is faster than individual tags.
For cash transactions, keep your cash box out of sight until you need to make change. A small lockable box or a cash drawer built into your table is better than leaving bills and coins visible. Count your starting cash before the fair opens and write it down. At the end of the day, count again and reconcile the difference—this is your sales total. Keep both counts for your records.
For card transactions, watch the screen to confirm the amount is correct before the customer taps or inserts their card. Once the transaction goes through, the customer receives a receipt (either printed or emailed, depending on your setup). Keep your own copy or a digital record for your books.
Handle card transactions and receipts
When a customer pays by card, the transaction appears on your phone or tablet screen. Ask them to tap, insert, or swipe their card as the reader prompts. Most modern cards and phones support tap-to-pay, which is the fastest method. The transaction usually completes in 5 to 10 seconds.
After the payment goes through, the customer's receipt prints automatically (if you have a portable printer) or is sent to their email address. You should also keep a digital record. Most card readers automatically log every transaction in an app or online dashboard, so you can review your sales later. Download or screenshot these records regularly in case you need them for taxes or disputes.
If a card is declined, ask the customer to try a different card or offer to hold their item while they go to an ATM. Do not ask why the card was declined or suggest reasons—that is between the customer and their bank. If the same card is declined twice, it is not going to work.
Protect yourself from fraud and chargebacks
A chargeback happens when a customer disputes a charge with their bank and the bank reverses the payment, taking the money back from you. At a vendor fair, chargebacks are rare because the customer is present and receives the item immediately, but they can still happen if someone claims they never received their purchase or that the item was damaged.
To protect yourself, keep a record of every transaction—the amount, the time, the customer's name if you have it, and what they bought. If you use a card reader, this is automatic. For cash sales, write down what you sold and how much you took in. If a chargeback does occur, you can show the card processor or the customer's bank that the transaction happened and the customer received the item.
Do not accept payment for an item you do not have in stock or cannot deliver immediately. If a customer wants to pre-order something for later, take their contact information and a deposit (cash or card), but make it clear the full payment is due when they pick up the item.
Reconcile your sales at the end of the day
Before you leave the fair, count your cash and compare it to your starting amount. The difference is your cash sales. Then check your card reader or payment app to see how much came in through cards. Add the two together—that is your total revenue for the day.
Write down the final numbers: starting cash, ending cash, cash sales, card sales, and total sales. Keep this record along with your receipts and transaction logs. You will need these for your tax return and to track your business income.
If your numbers do not match—for example, if you are missing cash or a transaction did not go through—investigate while the day is still fresh. Check your card reader's transaction log to see if a payment failed to process. Recount your cash to make sure you did not miscount. If you still cannot find the discrepancy, note it in your records and move on; small differences happen, especially in a busy fair environment.
Frequently Asked Questions
What if the fair organizer takes a percentage of my sales?
Some fairs charge a vendor fee (a flat amount per day or per booth) and some take a percentage of your sales. Check your vendor agreement before you sign up. If the fair takes a percentage, that comes out of your revenue, so factor it into your pricing. A fair that takes 10% of sales means you keep 90 cents of every dollar you make.
Can I use Venmo or PayPal Friends to take payments?
Technically yes, but it is not ideal. Venmo and PayPal Friends are designed for personal transfers, not business transactions, and they offer less fraud protection than a business account. If you use them, you may owe self-employment tax on the income but have fewer records to prove it. A proper card reader or PayPal Here account is better for a vendor fair because it creates an automatic record and is designed for business use.
What should I do if a customer's card is declined?
Politely tell them the card did not go through and ask if they want to try a different card or pay with cash. Do not speculate about why it was declined or ask personal questions. If they do not have another payment method, offer to hold the item for a short time while they find another way to pay, or let them leave without the purchase.
Do I need to report my vendor fair income to the IRS?
Yes. All income from self-employment, including vendor fair sales, is taxable. Keep your daily sales records and reconciliation notes. At tax time, add up all your sales from the year and report the total as business income. If you used a card reader, your processor may send you a 1099-K form summarizing your card transactions, though the threshold for this varies by processor and year.
What if I make a mistake and charge the wrong amount?
If you overcharged, refund the difference immediately. Most card readers let you process a refund right there—just enter the amount and the customer's card, and the money goes back. If you undercharged and realize it before the customer leaves, apologize and ask them to pay the difference. If you do not realize until after they are gone, note it in your records but do not chase them down; it is a cost of doing business.