A Coast FIRE calculator helps individuals determine how much money they need to save today so that their investments can grow on their own and fund retirement without any additional contributions. FIRE stands for Financial Independence Retire Early, and the Coast component means you have already saved enough that compound interest will carry your portfolio to your retirement goal. The calculator takes into account your current age, retirement age, expected annual return, and desired retirement nest egg to determine your Coast FIRE number. Once you reach it, you only need to cover current living expenses.
Coast FIRE is appealing because it offers flexibility. Once your Coast number is reached, you no longer need to aggressively save for retirement, freeing up income for enjoyment, career changes, or reduced work hours. The coast FIRE calculator is especially helpful for younger savers who benefit most from long compounding timelines. Most calculators use an assumed annual return of 5 to 7 percent after inflation. The result shows how much you must have invested today to coast comfortably. Use this tool alongside a full financial plan, and always account for healthcare costs, inflation, and lifestyle changes when planning for long-term financial independence and early retirement.