Year-End FSA Reminder: What to Check Before Your Plan Deadline

Last updated: October 2026

Before your Flexible Spending Account (FSA) deadline, check three things: how much is left in the account, the exact date your plan year or grace period ends, and whether your plan will accept a fitted pillow your provider recommends, along with the documentation it requires. Plan rules are set by your employer and your plan administrator, so the only reliable answer on eligibility comes from them. The second half of this article covers why pillow height matters for the neck, how a Pillowise fitting works, and what providers can do to help patients before the deadline.

Key takeaways

Before your FSA deadline, check how much is left, the date your plan year or grace period ends, and whether your plan accepts a fitted pillow.
Plan rules are set by your employer and plan administrator, and some plans ask for a letter of medical necessity as well as an itemized receipt.
A Pillowise fitting takes three measurements (shoulder width, neck circumference and neck length) and adds sleeping position and bed type to choose from seven sizes.

Why does the year-end deadline matter?

Many FSA plans set a deadline for eligible expenses at the end of the plan year. Some add a grace period or allow a limited carryover, and others do neither, so the date that applies to you depends on your plan.

Money that is not used under your plan's rules may be forfeited. Checking early in December leaves time to ask questions, collect paperwork, and book an appointment before offices close for the holidays.

For patients whose neck pain costs them sleep, the question is practical. In a cross-sectional study of 3,593 hospital workers, a high pain score raised the risk ratio for poor sleep to 1.48 (Vinstrup et al., 2018).

What should you confirm with your plan administrator?

Call or message your plan administrator before you buy anything, and ask these questions in writing if you can:

Eligibility. Will the plan accept a fitted cervical pillow recommended by a licensed healthcare provider?
Documentation. Does the plan require an itemized receipt only, or also a letter of medical necessity from the provider?
Dates. When does the plan year end, is there a grace period, and what is the last day to submit a claim?
Submission. How should the claim be filed, and is a card payment substantiated automatically or reviewed later?

Keep the answers with your receipts. If the plan says a letter of medical necessity is required, ask your provider about it before the deadline rather than after.

What should you ask your provider?

Ask whether the clinic can give you an itemized receipt showing your name, the date, the product name, and the price. Your plan administrator can tell you which details the receipt must show.

If your plan requires a letter of medical necessity, ask your provider whether one is appropriate in your case. That is a clinical decision for the provider, made on your history and examination.

Book the fitting early. Pillowise is fitted in the provider's office, and a December appointment can be harder to find than a November one.

What does pillow height change in the neck?

Pillow height changes cervical alignment measurably. A radiographic study of 16 adults found that as pillow height increased, T1 slope and C2-7 Cobb angle increased while neck tilt decreased (Kim et al., 2015).

Height also changes how pressure is distributed across the head and neck, as a crossover study of 10 adults using finite element modeling showed (Ren et al., 2016). In a pilot study of 15 adults using surface EMG, a height matched to shoulder width produced the lowest activity in the sternocleidomastoid and trapezius during side sleeping, and was rated most comfortable (Jiao et al., 2025).

Why do generic pillows miss?

A standard contoured pillow, not fitted to the individual, performed no better than ordinary shapes in a randomized study of 106 side sleepers (Gordon et al., 2009). No single optimal pillow height can be specified, because it depends on four variables that differ from person to person: cervical alignment, body dimension, contact pressure, and muscle activity (Lei et al., 2021).

What we measure

Pillowise is a fitted cervical pillow that licensed healthcare providers measure and dispense, made in seven sizes. Our sleep specialists take three measurements: shoulder width, neck circumference, and neck length. Combined with sleeping position and bed type, an algorithm identifies the best-fitting pillow from seven sizes.

Shoulder width is the measurement the EMG study found mattered most. A height matched to it produced the lowest neck and shoulder muscle activity during side sleeping (Jiao et al., 2025), and body dimension is what drives the individual optimum (Tian et al., 2025).

Pillowise pillows are made from premium Dutch memory foam and are OEKO-TEX Standard 100 certified, which means components were tested against the standard's limits for harmful substances.

What does the research not show yet?

The pillow studies are small, and the most recent systematic review screened 29,091 records, included five studies covering 239 patients, and found no clear advantage for any pillow type in chronic neck pain (Ghosh et al., 2025). We position a fitted pillow as an adjunct to exercise, manual therapy, and other conservative care, not as a treatment for a condition. This article is general information, not tax or benefits advice, and your plan administrator decides what your plan covers.

For providers: how can you help patients before the deadline?

Send a short reminder to patients in early December. Tell them to check their balance and plan dates, and to confirm with their plan administrator before purchasing.

Have a standard itemized receipt ready that lists the patient name, date, product name, and price. Where a plan requires a letter of medical necessity, write one only when it reflects your clinical judgment for that patient.

Hold a few fitting slots for the last weeks of the year. A fitted pillow extends the work of the visit into the hours between visits, alongside the exercise, manual therapy, and other care you are already delivering.

Common questions

Can I use my FSA for a fitted pillow?

That depends on your plan, and only your plan administrator can confirm it. Some plans ask for an itemized receipt, and some also ask for a letter of medical necessity from your provider. Confirm both the eligibility and the paperwork before the deadline.

What happens to FSA money I do not use?

Under many plans, money not used by the deadline is forfeited, although some plans offer a grace period or a limited carryover. Your plan documents and your plan administrator will tell you which rule applies to you.

Why see a provider instead of buying any pillow before the deadline?

Pillow height changes cervical alignment and neck muscle activity (Kim et al., 2015; Jiao et al., 2025), and the right height depends on the person (Lei et al., 2021). A provider fitting measures you rather than guessing, and the clinic can supply the itemized receipt your plan may ask for.

Is a contoured pillow from a store enough?

Not reliably. A standard contoured pillow, not fitted to the individual, performed no better than ordinary shapes in a randomized study of 106 side sleepers (Gordon et al., 2009), and no single optimal height can be specified because it depends on four variables that differ from person to person (Lei et al., 2021). A contour helps only if its height matches the person using it. That is what the fitting settles, in a provider's office.

Find a Pillowise provider or become one

Pillowise pillows are clinically measured and dispensed exclusively through licensed healthcare providers as part of broader sleep, posture, and recovery education.

To locate a Pillowise provider near you, visit: Find a Reseller

Licensed healthcare providers interested in offering Pillowise may register here: Become a Reseller

References

Ghosh, S. K., Goyal, M., & Goyal, K. S. (2025). Effect of pillow on pain, disability and sleep quality in patients with chronic neck pain: A systematic review. Rehabilitación, 59(3), 100922. https://doi.org/10.1016/j.rh.2025.100922

Gordon, S. J., Grimmer-Somers, K., & Trott, P. (2009). Pillow use: The behaviour of cervical pain, sleep quality and pillow comfort in side sleepers. Manual Therapy, 14(6), 671-678. https://doi.org/10.1016/j.math.2009.02.006

Jiao, R., Xiao, W., Wang, M., Yu, S., & Li, H. (2025). The impact of pillow height on neck muscle activity: A pilot study. Sleep and Breathing, 29(1), 40. https://doi.org/10.1007/s11325-024-03219-6

Kim, H. C., Jun, H. S., Kim, J. H., Ahn, J. H., Chang, I. B., Song, J. H., & Oh, J. K. (2015). The effect of different pillow heights on the parameters of cervicothoracic spine segments. Korean Journal of Spine, 12(3), 135-138. https://doi.org/10.14245/kjs.2015.12.3.135

Lei, J.-X., Yang, P.-F., Yang, A.-L., Gong, Y.-F., Shang, P., & Yuan, X.-C. (2021). Ergonomic consideration in pillow height determinants and evaluation. Healthcare, 9(10), 1333. https://doi.org/10.3390/healthcare9101333

Ren, S., Wong, D. W.-C., Yang, H., Zhou, Y., Lin, J., & Zhang, M. (2016). Effect of pillow height on the biomechanics of the head-neck complex: Investigation of the cranio-cervical pressure and cervical spine alignment. PeerJ, 4, e2397. https://doi.org/10.7717/peerj.2397

Tian, S., Yao, C., Wang, Y., Cao, X., Sun, Y., Wang, L., & Fan, Y. (2025). The individualized optimal pillow height and neck support design for side sleepers. Medical and Biological Engineering and Computing, 63(2), 535-544. https://doi.org/10.1007/s11517-024-03204-x

Vinstrup, J., Jakobsen, M. D., Calatayud, J., Jay, K., & Andersen, L. L. (2018). Association of stress and musculoskeletal pain with poor sleep: Cross-sectional study among 3,600 hospital workers. Frontiers in Neurology, 9, 968. https://doi.org/10.3389/fneur.2018.00968