The short version
- In the U.S., every infant formula must meet the same FDA nutrient requirements, so store brands are a safe way to save. Check with your pediatrician before switching.
- Bigger containers usually cost less per ounce, and Subscribe & Save takes off a bit more.
- Join Enfamil, Similac and Gerber programs for coupons and rebates, and check whether you qualify for WIC.
- Never water down formula or make it at home to stretch it. It isn't safe for babies.
Formula can cost more than any other baby expense in the first year. The good news: there are safe, simple ways to pay less. Here's the cheapest way to buy formula without cutting corners on your baby's nutrition.
1. Switch to a store brand (with your pediatrician's OK)
Infant formula sold in the U.S. has to meet federal nutrient requirements set by the FDA, whatever the brand. Store-brand formulas sold by big retailers are often made to match the ingredients of the name brands and usually cost much less. For many families, this is the single biggest saving.
2. Compare the price per ounce
Formula comes in many container sizes, and the bigger tubs nearly always cost less per ounce of powder. Check the unit price on the shelf tag or product page. Powder is also much cheaper than ready-to-feed liquid, which is convenient but costs more per bottle.
3. Join the free formula programs
All three big brands run free programs with coupons, rebates and sometimes samples. Enfamil says its program adds up to $400 in savings and rewards.
Also join MySimilac Rewards and MyGerber. Our free formula samples guide explains what each one sends.
4. Subscribe and stack discounts
- Subscribe & Save on Amazon: recurring deliveries come with an extra discount and mean you never run out at 2 a.m.
- Registry completion discounts: add formula to your registry and buy it with Amazon's, Target's or Babylist's 15% completion discount near your due date.
- Store loyalty programs: retailer apps often add coupons and rewards on formula.
5. Check whether you qualify for WIC
WIC helps eligible families with formula and food. If you're on Medicaid, SNAP or TANF, you automatically meet WIC's income rules, and many working families qualify too. SNAP benefits can also be used to buy formula.
6. Waste less
- Measure exactly and follow the label's mixing and storage instructions.
- Use a dispenser for outings so you don't waste pre-mixed bottles.
- Mix in batches with a pitcher if your label allows storing prepared formula in the fridge.
What never to do to save money
- Don't water down formula. Adding extra water dilutes the nutrients and can be dangerous for babies.
- Don't make homemade formula. The FDA warns against homemade formula because it can't reliably meet a baby's nutritional needs.
- Don't buy from unverified resellers. Formula from unknown sellers may be expired, stored badly or counterfeit. Stick with reputable retailers and check the expiration date.
For more ways to save, see free formula samples and our big guide to free baby stuff.
Frequently asked questions
Is store-brand formula safe?
Yes. Every infant formula sold in the U.S. must meet the same FDA nutrient requirements. Ask your pediatrician before switching, especially if your baby uses a specialty formula.
What is the cheapest way to buy formula?
Use a store brand if your pediatrician agrees, buy the largest powder containers, subscribe for an extra discount, join the Enfamil, Similac and Gerber reward programs, and check whether you qualify for WIC.
Can I add extra water to make formula last longer?
No. Watering down formula dilutes the nutrients and can be dangerous for babies. Always mix exactly as the label says.
How we research: we check every offer against the brand's or program's own website before publishing and when we update a guide. Programs change, so always confirm the details at the source before you sign up. Read our editorial standards, or tell us about a correction. Some links may be affiliate links; see our disclosure.