You don't want to pay full price for every match this World Cup, and you don't have to. Here are all the free trial deals I found at every major streaming site:

FubotV has a 5-day free trial for new members on any plan — their cheapest is $9.99 for the first month after the trial, then $19.99 per month, so paying one month covers most of the finals and is probably the least expensive way to watch every match with Fubo. If you're a Best Buy Plus or Total member you can get an extended 30-day free trial — again as long as you're a new subscriber. Peacock Premium Plus has a 7-day trial if you sign up using your Amazon account before being charged $15.99 per month, and I could access it on an Amazon account without Prime but that may vary for everyone. Xfinity also bundles Peacock Premium with some internet plans; check their support page for details. Walmart+ members can claim either Peacock Premium or Paramount+ Essential (but only one at a time and with a 90-day cooldown between switching). Some of these require you to be a new subscriber — and people have suggested using different email addresses if that's the hurdle, though I won't comment on how many.

Source: https://www.theverge.com/gadgets/948871/world-cup-streaming-free-trial-deal-sale