Best free bet & sports bonus offers for August 2025

Not all betting sites are worth your time and money. If we think a site could pose a risk to a bettor, we will make this clear. This could be for a few reasons, such as lack of legitimate licensing, poor customer support, suspension of accounts with no explanation, or other suspicious practices. Take caution when betting online and stick with our shortlisted sportsbooks, which have all passed quality and security tests.

Expert Rating

1.5/10

Why you should avoid
• Unprofessional customer support
• Site operators linked to questionable practices
• Not paid players their winnings

Expert Rating

1.2/10

Why you should avoid
• Reports of players not receiving winnings
• Misleading claims of licensing
• Unresponsive to customer complaints

Expert Rating

1.5/10

Why you should avoid
• 18+ months for withdrawal
• Locked-out accounts
• Slow response times

Casino.org has a comprehensive process for rating free bet offers. Our team of experts follow multiple steps and examine each deal from numerous perspectives. Below are the features we look at when reviewing and ranking the best free bet offers.

• Bonus amount

  Naturally, bettors want their free bet to be as large an amount as possible. Here we’ll be looking out for how generous a sportsbook is with their bonus. We’ll also check if the amount can be split over multiple wagers or if it must be used on one single selection.

• Wagering requirements

  Typically, a sportsbook will have wagering requirements attached to a free bet that will need to be fulfilled in order for you to withdraw your winnings. We’ll be looking at the T&Cs of each offer to assess how fair these requirements are for you. Low or non-existent wagering requirements will score the highest points.

• Minimum odds

  Some free bets will have restrictions on the minimum odds that they can be used on. Here we’ll be looking for sportsbooks that allow free bets to be used on low odds as well as high odds. Typically, most sportsbooks will have qualifying odds of 1.5 (1/2) or greater – this is what we’ll be using as our benchmark.

• Validity period

  Once your account has been credited with a free bet, there’ll likely be a validity period to use the bet by. Generous expiry periods let you take your time and use a bonus bet when it’s right for you. For this reason, we’ll be giving top marks to the sportsbooks that have large free bet validity periods.

• Banking & payout

  When reviewing the best free bet offers, we’ll also be looking out for a range of withdrawal methods. We’d expect to see a good range of valid debit or credit cards, e-Wallet and bank transfer options too. Then we’ll be assessing the payout speed to ensure bettors aren’t ever left waiting for their winnings.

• Safety & customer support

  We’ll only recommended sportsbooks that are of the highest standards. In every review we carry out a background check that covers the licensing and certification of each site. Then we’ll be looking out for their range of customer support options to ensure they have their bettors at the heart of what they do.

• Approval & rating

  After carefully analyzing all of the mentioned factors, our experts will rate the sportsbook and its bonus offer. The best free bet bonuses will be added to our shortlist. Rest assured our rankings are updated frequently to ensure that you’re getting the best deal possible.

  View our recommended free bets

Take it from us, not all free bet offers are the same. Explore the different sports bonuses below and find out what a sports betting site might have to offer.