How to choose a broker with low trading costs ?

When I compare brokers, I look beyond the advertised spread because commissions, swaps and withdrawal fees can make a big difference over time. I usually check a UK trading platform comparison first, because it helps me see how pricing, execution quality and regulation work together before I choose where to trade. I also pay attention to overnight financing, account types and whether the broker is clear about every possible charge. Low costs are important, but I would still choose transparent conditions and reliable execution over the cheapest headline offer.