We re-measured every margin in August. Three books got worse.
The monthly re-price found two operators tightening and three widening, with the biggest move at the bottom of our table.

BETTING NEWS & INSIGHTS
Regulation, product releases and market movement, written by the team that tests the bookmakers. No press releases reprinted, and no tips.
THE ARCHIVE
Every story we have filed here, most recent at the top. The other categories are one click away.
The monthly re-price found two operators tightening and three widening, with the biggest move at the bottom of our table.
We priced 240 accumulators against their boosted equivalents. The pattern is not subtle.
Six withdrawals at each of the fifteen bookmakers, at different times of day and week.
We compared 180 cash-out offers against the true value of the position. The average haircut was 6.4%.
WHAT MOVED THIS WEEK
Tracked across the fifteen bookmakers in our guide, with the reason where there is one.
WHO WRITES THIS
Everything on this page is written in-house and carries a byline. We do not publish operator copy as news.

Dara has covered Premier Division markets for six years and writes Oddsmark’s football previews. She focuses on set-piece and pressing data, and publishes every pick with the reasoning attached.
30 published
Ellis has priced sports markets for two bookmakers and now runs Oddsmark’s testing programme, measuring margins across forty markets a month. He writes about pricing, market rules and the arithmetic bettors are rarely shown.
31 published
Priya covers gambling regulation and consumer protection for Oddsmark. She previously reported on financial services compliance and has followed the affordability debate since the 2023 white paper.
15 published