As of 2026, if your checked baggage exceeds the weight limit you pre-purchased (either 10kg or 20kg), Ryanair charges an overweight baggage fee of €11 per kilo (or approximately £11). This fee must be paid at the airport check-in counter before you are allowed to board. It is important to note that Ryanair is extremely strict with these limits; if your bag is even slightly over, you can expect to be charged. To avoid these high per-kilo fees, it is always more cost-effective to accurately weigh your bags at home and purchase the correct allowance online before you arrive at the airport. For example, upgrading from a 10kg bag to a 20kg bag online during the booking process is significantly cheaper than paying for 10kg of "extra" weight at the gate. Additionally, no single piece of checked baggage can exceed 32kg due to health and safety regulations for airport ground staff. If you find your bag is overweight at the airport, try wearing your heaviest clothes or moving items into your "small personal bag" to avoid the €11/kg surcharge, as every gram counts with ultra-low-cost carriers.