Yes, you can add weight to your luggage by pre-purchasing additional allowance online through the airline's website or app, which is significantly cheaper than paying excess baggage fees at the airport counter. Most airlines in 2026, such as Air India, Emirates, or Delta, allow you to buy extra weight in increments (often 5kg or 10kg) or as an extra "piece" up to 23kg. For carry-on luggage, however, the rules have become much stricter; in 2026, many carriers have enforced a hard 7kg to 10kg limit for the cabin, and adding weight is generally not allowed unless you upgrade your fare class (e.g., from Economy to Business). If you find your bag is overweight at the airport, the "pro" move is to wear your heaviest clothing items, like jackets or boots, and move dense electronics like cameras or laptops into your "personal item" bag, as these are sometimes not weighed as strictly. Always weigh your bags at home using a digital scale, as being even 1kg over the limit in 2026 can trigger "excess baggage" fees that start at $15–$50 depending on the route and the airline's specific fee schedule.