Social Security will only replace a small portion of your income during retirement. For most people, it will only replace about 29% of their salary upon retirement.
For example, if your average annual salary throughout your working life was $51,795, Social Security will pay you about $21,273 per year when you retire. This example assumes payable benefits for a worker born in 1980 and retiring at age 65 in 2045, with a career average salary of $51,795. If your career average annual salary was a lot more than that, Social Security may cover even less of a percentage of income as benefits are capped at a certain level.
To get a rough estimate of monthly benefits you may collect when you retire, check out the Social Security Administration’s Quick Calculator. This can be a useful tool for comparing potential benefits with your current monthly expenses.