Most people budget for their monthly health insurance premium. It comes out of every paycheck like clockwork so it’s easy to account for. What catches people off guard are the costs that don’t come out every month but arrive unpredictably throughout the year: deductibles, copays, and coinsurance. Those three things together can add thousands of dollars to your annual healthcare spending, and most households don’t have a dedicated plan for any of them.
Here’s how each one works, how they interact with each other, and how to actually budget for all three before a medical bill surprises you.
The Four Terms You Need to Understand
Before getting into budgeting strategy, it helps to have these concepts clear because they build on each other.
Your premium is the fixed monthly amount you pay for coverage whether or not you use any healthcare. It’s the most visible healthcare cost and the one most people plan for.
Your deductible is the amount you pay entirely out of pocket before your insurance starts sharing costs. According to Gerald Wallet’s 2026 healthcare budgeting guide, the average individual health insurance deductible for employer-sponsored plans is around $1,700, while family deductibles can reach $3,000 to $8,000 or more. Until you hit your deductible, most services are paid entirely out of pocket at the insurance-negotiated rate, not the full sticker price but still your full responsibility.
Your copay is a flat fee you pay for specific services, often at the time of the visit. A primary care visit might have a $30 copay. A specialist visit might be $60. An urgent care visit might be $75. Copays are the most predictable out-of-pocket cost because they’re fixed amounts you can look up in your plan documents. Many preventive services have a $0 copay under the ACA.
Your coinsurance is the percentage of costs you share with your insurance company after you’ve met your deductible. If your plan has 20% coinsurance and you have a procedure that costs $2,000 after your deductible is satisfied, you pay $400 and your insurance pays $1,600. Coinsurance is what makes large unexpected medical bills possible even after you’ve hit your deductible.
Your out-of-pocket maximum is the ceiling that caps your total annual exposure. Once you’ve paid enough in deductibles, copays, and coinsurance combined to hit this number, your insurance covers 100% of covered services for the rest of the year. For 2026, the ACA-set out-of-pocket maximum for individual marketplace plans is $9,200, according to Gerald Wallet’s copay and coinsurance budgeting guide.
How They Work Together: A Real Example
This is where most people get lost, so a concrete example helps.
Suppose your plan has a $1,500 individual deductible, 20% coinsurance after the deductible, and a $6,000 out-of-pocket maximum. You need knee surgery that costs $12,000 at the insurance-negotiated rate.
You pay the first $1,500, satisfying your deductible. The remaining $10,500 is subject to coinsurance. You owe 20% of that, which is $2,100. Your insurance covers the other 80%, which is $8,400. Your total out-of-pocket for that event is $3,600. That’s under your $6,000 out-of-pocket maximum, so coinsurance continues to apply for the rest of the year until you reach $6,000.
If you then have a second significant medical event later in the year, you’ve already paid $3,600 toward your $6,000 out-of-pocket maximum. You’d owe coinsurance on additional costs until you reach the remaining $2,400, at which point insurance covers 100% for the rest of the year.
The key insight is that your worst-case financial exposure in a given plan year is roughly equal to your out-of-pocket maximum. That number, not your deductible and not your premium, is what you need in reserve for a bad health year.
Why Most People Underestimate Their Healthcare Spending
According to Gerald Wallet’s analysis, most people underestimate their annual healthcare costs because they only plan for copays and forget about the deductible and coinsurance exposure underneath. The mental model most people carry is premium plus occasional copay. The actual model is premium plus deductible plus coinsurance up to the out-of-pocket maximum, with copays mixed in throughout.
American Express’s healthcare budgeting guide describes three layers of healthcare costs to plan for: fixed costs like your premium, routine costs like expected copays for regular visits, and unexpected costs that include deductible and coinsurance exposure. Most households budget for the first layer and partially for the second but have no financial plan for the third.
Healthcare costs are also rising. According to a 2025 analysis, health insurance costs are rising at a rate of 5.2% annually driven by higher hospital prices, prescription drug costs, and increased use of specialty care. The average individual deductible for employer-sponsored plans has risen steadily alongside that trend.
How to Actually Budget for These Costs
The goal is to build a healthcare budget that covers all three layers so that medical bills arrive as planned expenses rather than financial emergencies.
Start with your known fixed costs. Your monthly premium is the easiest. If your employer deducts it from your paycheck pre-tax, you may not even feel it directly. Write down the annual total anyway so you have a complete picture of what healthcare actually costs you each year.
Then estimate your routine costs. Look at last year’s explanation of benefits statements from your insurance company, or log into your insurance portal, and count how many times you visited a primary care doctor, specialist, urgent care, or other provider. Multiply those visits by the copay amounts on your current plan. Add your estimated prescription costs based on what you take regularly. This gives you a reasonable estimate of your routine annual healthcare spending.
Then account for your deductible exposure. If you didn’t hit your deductible last year, that doesn’t mean you won’t this year. The right way to budget for your deductible is to keep the full deductible amount available in a savings account or HSA at all times during the year. That way if you need it, it’s there. If you don’t spend it, it stays available for next year.
Finally, understand your coinsurance exposure. Your worst-case scenario for any given year is your out-of-pocket maximum. The gap between your deductible and your out-of-pocket maximum is your coinsurance zone, the range where you’re paying a percentage of costs rather than full costs or zero costs. Building toward your full out-of-pocket maximum in savings is the complete version of healthcare financial preparedness. Not everyone can get there immediately, but knowing the number is the first step.
The HSA and FSA Connection
If your employer offers an HSA or FSA, those accounts are specifically designed to help you cover deductibles, copays, and coinsurance with pre-tax dollars. Funding one of these accounts is effectively a discount on every dollar you spend on healthcare because the contributions reduce your taxable income.
For 2026, the HSA contribution limit is $4,400 for individual coverage and $8,750 for family coverage. The FSA limit is $3,400. Contributing the maximum to either account, or as much as you can afford, reduces the after-tax cost of your deductible and copay spending throughout the year. For more on how these accounts work and which one fits your situation, our post on HSA vs FSA: Which One Might Fit Your Budget covers the full comparison. (https://luckyfriday.app/blog/hsa-vs-fsa-which-might-fit-your-budget)
Tracking What You Actually Spend
The single best input for next year’s healthcare budget is this year’s actual spending. Most people have no idea what they spent on healthcare last year beyond what came out of their paycheck for premiums. But the copays, the pharmacy runs, the urgent care visits, the specialist bills, those numbers exist and are worth knowing.
A budgeting app with a dedicated healthcare category lets you capture every medical expense as it happens throughout the year. At the end of the year, you have an accurate picture of your actual healthcare spending across all three cost layers, which makes next year’s open enrollment decisions significantly more informed.
Lucky Friday is a free budgeting app available on iOS and web where you can create a healthcare category with subcategories for premiums, copays, prescriptions, deductible spending, and coinsurance. Core budgeting tools are free forever with no credit card required and no trial expiration. Bank sync is available on the premium plan at $12.99 per month or $99.99 per year if you want transactions to import automatically. Knowing your real healthcare spending number is one of the most useful things a budget can show you.
If you are still working on building the emergency fund that would cover your out-of-pocket maximum in a bad health year, our guide on how to start an emergency fund when you’re already behind has a practical approach that works even when money is tight. (https://luckyfriday.app/blog/how-to-start-an-emergency-fund-when-youre-already-behind-the-my-first-buffer-method)
Common Questions About Budgeting for Healthcare Costs
What is the difference between a deductible and an out-of-pocket maximum?
Your deductible is the amount you pay entirely out of pocket before your insurance starts sharing costs. Your out-of-pocket maximum is the most you will pay in a given plan year, including your deductible, copays, and coinsurance combined. Once you hit your out-of-pocket maximum, your insurance covers 100% of covered services for the rest of the year. The out-of-pocket maximum is your worst-case financial scenario for any given plan year, and it’s the number you should have in mind when thinking about healthcare financial preparedness.
Does my copay count toward my deductible?
It depends on your plan. Some plans count copays toward your deductible and others don’t. Most plans do count copays toward your out-of-pocket maximum even if they don’t count toward the deductible. The only reliable way to know how your specific plan handles copays is to read your Summary of Benefits and Coverage document or call your insurance company’s member services line.
How much should I save for healthcare costs each year?
At minimum, you should have your full deductible available in savings or an HSA at all times during the year. A more complete approach is to work toward having your full out-of-pocket maximum available, since that covers your worst-case scenario for the year. The average individual employer-sponsored deductible was around $1,700 in 2025, with family deductibles ranging from $3,000 to $8,000. For 2026, the ACA out-of-pocket maximum for individual marketplace plans is $9,200.
What is coinsurance and how does it affect my budget?
Coinsurance is the percentage of medical costs you pay after you’ve met your deductible. A common coinsurance split is 80/20, meaning your insurance pays 80% and you pay 20% of covered costs after your deductible is satisfied. Coinsurance applies until you hit your out-of-pocket maximum. If you have a significant medical event in a year where you’ve already met your deductible, coinsurance is the mechanism that determines how much of that bill you owe. Budgeting for coinsurance means understanding the gap between your deductible and your out-of-pocket maximum and having a financial cushion that covers some portion of that range.
What healthcare costs do not count toward my out-of-pocket maximum?
Costs that typically do not count toward your out-of-pocket maximum include your monthly premium, out-of-network care if you’re on an in-network-only plan, non-covered services, and balance billing amounts from out-of-network providers. The specific exclusions vary by plan, so reviewing your Summary of Benefits and Coverage document is the most reliable way to understand what does and doesn’t count toward your cap.
SOURCES:
Gerald Wallet. Copay vs Coinsurance vs Deductible: A Complete Budgeting Guide for 2026. ACA out-of-pocket maximum $9,200 for 2026, three-layer budgeting approach, most people underestimate by forgetting deductible and coinsurance. https://joingerald.com/learn/financial-wellness/copay-vs-coinsurance-budgeting-guide
Gerald Wallet. How Much to Budget for Health Deductibles in 2026. Average individual employer-sponsored deductible around $1,700, family deductibles $3,000 to $8,000. https://joingerald.com/learn/financial-wellness/how-much-to-budget-for-health-deductibles
American Express Credit Intel. How to Budget for Health Care Costs. Three types of healthcare costs: fixed, routine, and unexpected. Deductible and copay interaction with premium. https://www.americanexpress.com/en-us/credit-cards/credit-intel/budget-for-health-care/
Cosmo Insurance Agency. Understanding Deductibles, Copays, and Out-of-Pocket Costs in 2026. How deductible, copay, coinsurance, and out-of-pocket maximum work together. January 2026. https://cosmoins.com/?p=37043
Church Suite Support via web log. Health Insurance Costs in 2025. 5.2% annual healthcare cost increase, average deductible $1,700 for individual plans per Kaiser Family Foundation. https://support.churchsuite.co.uk/short-vision/health-insurance-cost-2025-guide-1770781896