Fixed rates guarantee your monthly payments stay the same for a set period (usually 2, 3, or 5 years), making budgeting predictable. Variable rates, such as trackers or discounted rates, fluctuate with the market, meaning payments can rise or fall. Fixed rates offer peace of mind, while variable rates can potentially offer lower initial payments. Consider your financial stability, future plans, and how comfortable you are with payment changes. An adviser can help weigh up these options, recommending what suits your lifestyle best.