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Eligibility guide

Water filters for renters: HSA/FSA-eligible options without installation

Renting does not mean settling for unfiltered water. Point-of-use systems are HSA/FSA-eligible, need no permanent plumbing changes, and move with you when you go. Here are the best no-install options and how they qualify.

Reviewed against IRS Pub. 502 & 969· Stephen Evangelista· Updated June 16, 2026
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Renter-friendly

Eligible and install-free. Point-of-use systems qualify with a Letter of Medical Necessity, need no permanent changes, and come with you when you move — ideal for rentals.

The renter's challenge

A whole-house system installs at the point of entry, which usually is not an option in a rental — and you would not want to leave it behind anyway. The solution is point-of-use: systems that treat one tap and attach without permanent plumbing work.

No-install eligible options

  • Under-sink reverse osmosis — connects to the existing kitchen supply and can be removed when you leave; the most thorough option. See RO eligibility.
  • Countertop and faucet filters — the simplest, fully renter-friendly, lower cost.

All of these can be eligible with a Letter of Medical Necessity, the same as larger systems.

What to avoid as a renter

Skip anything requiring permanent plumbing modification or landlord approval. The whole point is a system that works in your unit today and moves with you tomorrow — protecting both your water and your deposit.

It moves with you

Because point-of-use systems are not built into the home, they are a portable investment: buy once with pre-tax dollars, take it to your next place. Replacement filters can use future eligible funds too.

Best for rentals

Under-sink reverse osmosis

Clean drinking water with no permanent install — around $399, eligible via the TrueMed checkout.

Check price

How to buy

Pick a point-of-use system, buy through the checkout that issues your Letter of Medical Necessity, and keep your records — see how to buy with HSA/FSA. Educational only, not medical advice.

Frequently asked questions

Can renters buy an HSA/FSA-eligible water filter?

Yes. Point-of-use systems like under-sink RO and countertop filters qualify with a Letter of Medical Necessity and need no permanent installation.

What's the best filter for a rental?

An under-sink reverse osmosis system is the most thorough no-install option, around $399. Countertop and faucet filters are even simpler.

Does it move with me?

Yes. Point-of-use systems are not built into the home, so you can remove them and take them to your next place.