The amount you contribute depends on your plan type and your expected medical costs
The IRS sets a maximum contribution limit each year, but that ceiling is not the same as the right amount for you. Your actual contribution should match three things: how much your plan allows you to set aside, how much you can afford to save without breaking your budget, and how much medical spending you realistically expect in the coming year.
For 2024, the IRS limits are $4,150 for individual coverage and $8,300 for family coverage. These limits change annually, usually by small amounts. If you are age 55 or older, you can add an extra $1,000 to either limit. Your employer may also contribute to your account, and that counts toward your limit—so if your employer puts in $2,000 and you put in $1,500, you have hit $3,500 of your $4,150 individual limit.
The real question is not what the law allows, but what makes sense for your situation. That depends on what you actually spend on medical care, what your deductible is, and whether you have predictable ongoing costs like prescriptions or regular appointments.
Key Takeaways
- The IRS sets yearly contribution limits ($4,150 for individual, $8,300 for family in 2024), but you do not have to contribute the maximum.
- Your employer's contributions count toward your limit, so check your benefits paperwork to see how much they are putting in before you decide how much to add.
- A reasonable starting point is to contribute enough to cover your deductible plus any regular medical costs you know are coming—prescriptions, therapy, dental work.
- You can change your contribution amount once a year during open enrollment, or when ready if you have a may have access to life change like a new job or birth.
- Money left in your account at the end of the year rolls forward indefinitely, so you do not lose it if you do not spend it.
How to estimate what you will actually spend
Start with your deductible. If your plan requires you to pay the first $1,500 out of pocket before insurance kicks in, that $1,500 is money you will need to cover. An HSA is specifically designed to pay deductibles, so this is the floor of what makes sense to contribute.
Then add any medical costs you know are coming. If you take a prescription that costs $40 a month, that is $480 a year. If you see a therapist twice a month at $50 per visit after your deductible, that is $1,200 a year. If you wear glasses and need new ones every two years, divide that cost by two. If you have a planned surgery or dental work scheduled, add that in. These are not guesses—they are costs you can actually predict.
Add a small buffer for the unexpected: a sprained ankle, an ear infection, an urgent care visit. Many people add $500 to $1,000 beyond their predictable costs. This is the amount that sits in your account as a safety net.
The sum of your deductible plus your predictable costs plus your buffer is a reasonable contribution target. You do not have to hit the IRS maximum just because it exists.
What happens if you contribute too much or too little
If you contribute more than you spend, the money stays in your account. This is actually one of the HSA's main advantages: unlike a flexible spending account (FSA), which has a "use it or lose it" rule, an HSA rolls over every year. Money you do not spend at age 30 is still there at age 65. This means contributing more than you need in a given year is not wasteful—it is building a medical savings fund for later.
If you contribute too little and run out of money mid-year, you can pay medical costs out of pocket and then reimburse yourself from your HSA later, even years later, as long as you have receipts. You can also wait until open enrollment to increase your contribution for the following year, or request a change when ready if you have a may have access to event like a new diagnosis or a change in your insurance plan.
Employer contributions and how they affect your decision
Many employers contribute to their employees' HSAs as part of the benefits package. This money counts toward your annual limit. Before you decide how much to contribute yourself, find out how much your employer is putting in.
If your employer contributes $2,000 and your deductible is $1,500, you might choose to contribute only $500 more, bringing your total to $2,500. If your employer contributes nothing, you would contribute the full $1,500 yourself. Check your benefits summary or ask your HR department for the exact amount—it is usually listed in the plan documents or the benefits portal.
Some employers offer a match, similar to a 401(k): they will match a percentage of what you contribute up to a certain amount. If your employer matches dollar-for-dollar up to $1,000, contributing $1,000 of your own money means your employer adds another $1,000, doubling your savings. This is information programs, so it usually makes sense to contribute at least enough to capture the full match.
Contribution timing and payroll deductions
If you have an HSA through your employer, you typically contribute through payroll deduction. This means the money comes out of your paycheck before taxes are calculated, which lowers your taxable income for the year. This is one of the HSA's tax advantages.
You can change your contribution amount during open enrollment, which is usually in the fall for coverage starting January 1. You can also change it when ready if you have a may have access to life event: marriage, divorce, birth of a child, loss of other health coverage, or a change in your employer's plan.
If you contribute through payroll, the money goes into your HSA account automatically each pay period. If you contribute on your own (for example, if you are self-employed or if you want to add money beyond what payroll allows), you can deposit money directly into your HSA account up until the tax filing important date of the following year, usually April 15.
How much to keep in your account long-term
Once you have been using an HSA for a few years, you will have a sense of your actual spending patterns. Some people spend their full deductible every year. Others rarely use their medical benefits and accumulate a large balance.
If you consistently spend less than you contribute, you might lower your contribution in future years. If you consistently spend more, you might increase it. The goal is to have enough in the account to cover your deductible and predictable costs without leaving so much unused money that you could be saving it elsewhere.
Many financial advisors suggest treating an HSA like a retirement account once your deductible and when ready medical costs are covered. If you have $5,000 in your account and you only spend $2,000 a year on medical care, you might contribute less going forward and let the account grow. After age 65, you can withdraw money from your HSA for any reason without penalty (though non-medical withdrawals are taxed as income). This makes it a powerful long-term savings tool.
Frequently Asked Questions
Can I change how much I contribute mid-year?
You can change your contribution during open enrollment, which happens once a year. If you have a may have access to life event—marriage, birth, loss of coverage, or a change in your employer's plan—you can change it when ready. Otherwise, your contribution amount is locked in for the year.
What if I contribute to an HSA but then switch to a different health plan?
The money in your HSA is yours to keep. If you switch to a plan that does not may have access to for an HSA, you can no longer contribute new money, but you can still use the balance you have already saved for medical expenses. If you switch to a different HSA-may be able to access plan, you can continue contributing and using the same account.
Is it better to contribute the maximum or contribute less?
Contributing the maximum makes sense only if you can afford it and expect to spend it or want to build long-term medical savings. If your budget is tight, contribute enough to cover your deductible and predictable costs. The HSA is a tool to match your spending, not a savings goal in itself.
Can my employer change how much they contribute?
Yes. Employers can change their HSA contribution amounts from year to year. Check your benefits materials each year during open enrollment to see if the employer contribution has changed, and adjust your own contribution accordingly.
What happens to my HSA if I do not use all the money by the end of the year?
The money rolls over to the next year. Unlike a flexible spending account, there is no important date to spend it. You can accumulate HSA funds over many years and use them whenever you have medical expenses, even decades later.