Not every benefit program works the same way. Some have strict annual windows. Others accept applications any day of the year. Miss the ACA deadline and you could go without health insurance for a year. Apply for SNAP any month and you can be covered within 30 days. Knowing which programs have deadlines and which don't is one of the most practical things you can do before you need help.
This guide covers the major federal benefit programs, when each one accepts applications, and what to do if you miss a window.
Programs You Can Apply for Any Time
Several of the largest programs in the country have no fixed enrollment window. You apply, get a decision, and coverage or benefits start shortly after approval.
Medicaid and CHIP
Medicaid and the Children's Health Insurance Program (CHIP) accept applications 365 days a year. There is no open enrollment period and no deadline to meet. If your income drops, you lose a job, have a baby, or otherwise become eligible, you can apply that same week.
Eligibility is based on income relative to the Federal Poverty Level (FPL). In states that expanded Medicaid under the ACA, most adults with household income up to 138% FPL qualify. In the 10 states that have not expanded Medicaid, income limits are often much lower for non-disabled adults.
| Household Size | 138% FPL (2025) | 100% FPL (2025) |
|---|
| 1 | $20,783 | $15,060 |
| 2 | $28,208 | $20,440 |
| 3 | $35,632 | $25,820 |
| 4 | $43,056 | $31,200 |
You can apply through your state Medicaid agency, through Healthcare.gov (federal marketplace), or through a local navigator. Most states process applications within 45 days, though disability-related Medicaid can take up to 90 days.
SNAP (Food Assistance)
SNAP also has no enrollment season. You apply through your state's benefits agency at any point during the year. Once approved, benefits load onto an EBT card within 30 days. In some cases, if your household is in immediate need, you may qualify for expedited benefits within 7 days.
Income limits for SNAP are set at 130% FPL for gross income and 100% FPL for net income, though many states offer broad-based categorical eligibility that allows households up to 200% FPL to qualify.
| Household Size | 130% FPL Gross Limit (2025) |
|---|
| 1 | $1,632/month |
| 2 | $2,215/month |
| 3 | $2,799/month |
| 4 | $3,383/month |
WIC
WIC (Women, Infants, and Children) is open year-round. To qualify, you must be pregnant, recently postpartum, breastfeeding, or have a child under age 5. Income must be at or below 185% FPL.
| Household Size | 185% FPL Annual (2025-2026) |
|---|
| 1 | $27,861 |
| 2 | $37,814 |
| 3 | $47,767 |
| 4 | $57,720 |
One fast path to WIC eligibility: if your household already receives Medicaid, SNAP, or TANF, you are considered automatically income-eligible for WIC. You still need to apply through a local WIC clinic, but the income verification step is skipped.
SSI and SSDI
Both Supplemental Security Income (SSI) and Social Security Disability Insurance (SSDI) accept applications year-round through the Social Security Administration. There is no enrollment window. The main challenge with these programs is processing time. Initial decisions typically take 3 to 6 months. If denied, you can appeal, which adds additional time.
For 2026, the SSI federal benefit rate is $967/month for an individual and $1,450/month for a couple, reflecting a 2.8% COLA increase.
Apply online at ssa.gov, by calling 1-800-772-1213, or by visiting a local Social Security office.
Programs with Fixed Enrollment Windows
These programs require you to act during a specific period. Miss the window and you may have to wait until next year.
ACA Health Insurance Marketplace
The Affordable Care Act marketplace follows a strict annual calendar. For 2026 coverage, the enrollment period ran November 1, 2025 through January 15, 2026. If you enrolled by December 15, 2025, your coverage started January 1, 2026. Enrollment between December 16 and January 15 meant a February 1 start date.
For 2027 coverage, enrollment will run November 1, 2026 through December 15, 2026 (exact dates may vary on state-based exchanges).
Important 2026 policy change: The enhanced subsidy provisions that ran from 2021 to 2025 expired at the end of 2025. Starting in 2026, households above 400% FPL no longer qualify for premium tax credits. The percentage of income required for benchmark plan premiums now ranges from 2.1% to 9.96% of household income based on income and age.
| Income (% FPL) | Max Premium Contribution (2026) |
|---|
| Up to 150% | 0% (fully subsidized) |
| 150% to 200% | 0% to 2% |
| 200% to 250% | 2% to 4% |
| 250% to 300% | 4% to 6% |
| 300% to 400% | 6% to 9.96% |
| Above 400% | No subsidy available |
Outside of open enrollment, you can only enroll through a Special Enrollment Period (SEP) triggered by a qualifying life event such as losing other coverage, getting married, having a baby, moving to a new coverage area, or other circumstances. The income-based SEP that previously allowed low-income individuals to enroll year-round was eliminated for 2026.
Medicare
Medicare enrollment is more complex because there are multiple windows tied to different life stages.
Initial Enrollment Period (IEP): When you first become eligible for Medicare at age 65, you have a 7-month window. This begins 3 months before your 65th birthday month, includes your birthday month, and extends 3 months after. Signing up during the first 3 months ensures your coverage starts on time. Waiting until after your birthday month delays coverage.
Annual Enrollment Period (AEP): Every year from October 15 through December 7, existing Medicare beneficiaries can switch plans, add or drop Part D drug coverage, or move between Original Medicare and Medicare Advantage. Changes take effect January 1 of the following year.
Medicare Advantage Open Enrollment Period: January 1 through March 31 each year. If you are already enrolled in a Medicare Advantage plan, you can switch to a different Advantage plan or return to Original Medicare during this window.
Special Enrollment Periods: Available if you delayed Medicare because you had employer coverage through a job. You generally have 8 months after losing that coverage to enroll in Part A and Part B without penalty.
Missing your Initial Enrollment Period without a valid reason results in permanent late enrollment penalties: 10% higher Part B premiums for each 12-month period you delayed.
Seasonal Programs
LIHEAP (Home Energy Assistance)
LIHEAP runs on a seasonal cycle tied to heating season. The federal government allocates funds to states, which then set their own application windows. Most states open their heating assistance season in the fall (typically October or November) and close it in the spring (March through May), depending on funding availability.
For the 2025-2026 heating season, many states opened applications in November or December 2025. Some states, like Pennsylvania, extended their deadline to May 8, 2026 due to federal funding delays. Cooling assistance, when available, typically runs June through August.
Income limits vary by state, but federal guidelines set eligibility at or below 150% FPL as the baseline standard. Some states have set limits as high as 60% of state median income, whichever is greater.
| Household Size | 150% FPL (2025) |
|---|
| 1 | $22,590 |
| 2 | $30,660 |
| 3 | $38,730 |
| 4 | $46,800 |
Apply through your state's LIHEAP office or local community action agency. Funds are limited and run out each season, so applying early in the season improves your chances of receiving assistance.
Tax-Based Benefits
Earned Income Tax Credit (EITC) and Child Tax Credit (CTC)
These are not enrollment programs. You claim them when you file your federal tax return. The filing deadline for tax year 2025 returns is April 15, 2026.
The EITC can be worth up to approximately $7,830 for a family with three or more qualifying children (2025 tax year). The Child Tax Credit provides up to $2,000 per qualifying child under 17.
To receive these credits, you must file a return even if your income is low enough that you would not otherwise owe taxes. Many people who qualify for the EITC do not claim it simply because they do not file.
If you miss the April 15 deadline, you can still file late without penalty if you are owed a refund. You have up to 3 years from the original filing deadline to claim a refund.
Full Calendar Summary
| Program | When to Apply | Notes |
|---|
| Medicaid / CHIP | Year-round | Apply any time, 45-day processing |
| SNAP | Year-round | Expedited benefits available in 7 days |
| WIC | Year-round | Income-eligible if on Medicaid/SNAP/TANF |
| SSI / SSDI | Year-round | 3 to 6 month processing time |
| ACA Marketplace | Nov 1 to Jan 15 (for next year) | SEPs available for life events |
| Medicare Initial | 7-month window around 65th birthday | Penalties for late enrollment |
| Medicare AEP | Oct 15 to Dec 7 | Annual plan changes |
| Medicare Advantage OEP | Jan 1 to Mar 31 | Switch plans or return to Original Medicare |
| LIHEAP | Typically Oct through May | Varies by state, funds limited |
| EITC / CTC | At tax filing (deadline April 15) | File even with low income |
What to Do If You Missed a Deadline
Missing the ACA open enrollment period is the most common deadline problem. Here is what to do:
Check whether you qualify for a Special Enrollment Period. If you lost job-based coverage, had a baby, got married or divorced, or moved to a new area, you likely have 60 days from that event to enroll.
If you do not have a qualifying event, look into Medicaid. If your income is below 138% FPL (in expansion states), you can enroll in Medicaid year-round. This is a better option than going uninsured.
For Medicare late enrollment, contact the Social Security Administration as soon as possible. The longer you wait, the higher the permanent penalty.
For LIHEAP, check whether your state has a cooling assistance program or a crisis component that operates outside the main heating season. Crisis assistance is often available when a shutoff is imminent.
Check What You Qualify For
Knowing the deadlines is only half the picture. The other half is knowing which programs you actually qualify for. Income limits, household size, state-specific rules, and life circumstances all affect eligibility.
Use the free screener at benefitsusa.org to check your eligibility across more than 11 programs at once. It takes about 5 minutes and shows you estimated benefits and next steps for each program you may qualify for.
Frequently Asked Questions
When is the next ACA open enrollment period?
Open enrollment for 2027 ACA marketplace coverage will begin November 1, 2026. If you want coverage to start January 1, 2027, you must enroll by December 15, 2026. Exact dates for state-run exchanges may differ.
Can I apply for Medicaid any time of year?
Yes. Medicaid has no open enrollment period. You can apply any day of the year through your state's Medicaid agency or through Healthcare.gov. Coverage typically begins the month you apply or the following month after approval.
What counts as a qualifying life event for ACA special enrollment?
Qualifying life events include losing health coverage (job loss, aging off a parent's plan, loss of Medicaid), moving to a new area, getting married, having or adopting a child, and certain changes in immigration status. You generally have 60 days from the event to enroll.
How long does it take to get approved for SNAP?
Most SNAP applications are processed within 30 days. If your household has very low income and assets, you may qualify for expedited processing and receive benefits within 7 days.
When should I apply for Medicare before turning 65?
You can enroll starting 3 months before your 65th birthday month. Enrolling during this 3-month window ensures your coverage starts on your birthday month. Waiting until after your birthday delays your start date.
Is LIHEAP first come, first served?
In most states, yes. LIHEAP funding is limited and many states exhaust their allocation before the official season closing date. Applying early in the season gives you the best chance of receiving assistance.
Can I claim the EITC if I didn't file taxes last year?
You have up to 3 years from the original filing deadline to claim a refund, including the EITC. If you missed a prior year, file the late return as soon as possible. You cannot claim the credit without filing a return.
What happens if I miss Medicare open enrollment?
If you miss your Initial Enrollment Period without qualifying for a Special Enrollment Period, you will face late enrollment penalties. Part B premiums increase by 10% for each 12-month period you delayed enrollment, and this penalty lasts for as long as you have Part B coverage.
