For new bettors, parlay cards can seem a little intimidating at first glance—but once you understand how they work, they become one of the most exciting parts of sports betting. Whether you’re inside a sportsbook kiosk or betting online, learning how to fill a parlay card correctly is essential if you want your wager placed accurately and confidently. In this guide, we’ll walk you through exactly how to fill out a betting card from start to finish.

What Is a Parlay Card?

A parlay card is a betting slip that allows you to combine multiple picks—called legs—into one wager.
Unlike single bets, a parlay requires every selection to win for the ticket to cash, but the payout is much higher because the odds multiply together.

Parlays can include:

• Moneylines

• Spreads

• Totals (Over/Under)

• Player props

• Game props

• Multi-sport combinations

Before you even start filling anything out, it’s important to have your picks ready and understand how many legs you want to combine.

How to Fill a Parlay Card: Step-by-Step

Here’s the simplest way to ensure you fill your card correctly every time.

Step 1: Pick the Games or Events You Want to Include

Before you grab the card, decide what you’re betting:

• Which teams?

• What bet type (ML, spread, total, prop)?

• How many legs?

This makes it easier when you actually fill out betting card fields.

Step 2: Locate the Correct Parlay Card

Sportsbooks can offer multiple types of cards:

• Standard parlay cards (spreads/totals)

• Teaser cards

• Props cards

• Multi-sport cards

• Odds-boost or promotional cards

Make sure you’re using the correct one for your bets. A teaser card, for example, won’t allow straight moneylines. With Action 24/7, we offer standard parlay cards with spreads.

Step 3: Write Down the Team or Bet Number

Most sportsbooks list games using rotation numbers (e.g., 312, 313, 314).
These numbers match the betting board or the sportsbook app.

On your card:

• Find the box next to each line

• Write the rotation number or team name clearly

Writing rotation numbers is preferred because it eliminates confusion.

Step 4: Select the Line You Want

Under each team or matchup on the parlay card, you’ll see lines such as: Spread: -3.5 or +7

Next to the team or number, fill in:

• The line you’re choosing

• Or check the box if the card uses checkmarks instead of handwriting. With Action 24/7, we only offer digital parlay cards, do you will just check the box.

This is one of the most important parts of learning how to fill a parlay card correctly—always double-check the line before submitting.

Step 5: Add Each Leg to the Card

A parlay card usually has multiple lines or boxes for entries, such as Game 1, Game 2, Game 3, etc…

Always make sure to double-check that you have all of the right picks that you want.

Step 6: Fill Out Your Wager Amount

When you have alll your picks in, it is important to place your wager amount. Remember, this is the amount you’re betting, NOT the potential payout.

Some real-life parlay card examples of what you can bet are anywhere from $1 to $50 with Action 24/7. Remember, even tiny wagers can still produce big wins depending on the number of legs.

Step 7: Submit the Card to the Ticket Writer

Once your card is filled out, make sure you have all the right selections. Double-check and make sure you have the right wagers. Tips for Filling Out Parlay Cards Like a Pro

• Stick to 3–5 legs for better odds of hitting.

• Know the rules. Some cards lock lines early, depending on the sportsbook.

• Avoid high-variance games. If a matchup feels unpredictable, leave it off your parlay.

• Use stats, not guesswork. Smart research leads to better slips.

• Double-check your writing. One wrong rotation number can ruin an otherwise winning card.

Learning how to fill a parlay card isn’t complicated once you break it down step-by-step. When you know how to fill out a betting card properly, you avoid mistakes and give yourself the best chance at cashing in your parlay.

Thankfully, Action 24/7 is one of the only online sportsbooks to offer online parlay cards in its app! You can fill out your form today and become a winner!