There’s a certain kind of person who will spend $4,000 on a mattress. I’ve met them. I’ve also tested more than 100 mattresses over nine years, and the gap between a $400 bed and a $4,000 bed is real but smaller than the price suggests, especially for a guest room, first apartment, dorm, or kid’s room. So I did the unglamorous version of my job: sleeping on 12 of the best cheap mattresses under $500 for two weeks each. I also used an infrared thermometer, a vibrometer, and a bowling ball I’ve dropped so many times my wife has stopped asking questions. Here’s what held up.

Quick picks

Best cheap mattresses under $500: Allswell Hybrid ($282)

Allswell Hybrid Mattress

Allswell Hybrid Mattress

The Allswell won on the metric that’s hardest to argue with: I slept better on it than on anything else in this group. My Garmin sleep scores averaged the highest on it across two weeks, and it wasn’t close.

It’s a 10-inch hybrid with CertiPUR-US-certified foams over pocketed coils, and it leans firm. Stomach and back sleepers, this is your bed. I’m a side sleeper, and I fought it at first. My hips just wanted more give, but I still woke up feeling better on it than on the plusher options.

The coils do good work at the perimeter. The edge sank 3.5 inches when I sat on it, better than average at this price. I never felt like I’d slide off. Motion isolation was middling: It passed my bowling ball test about half the time.

The catch is heat. The Allswell held onto more of it than almost anything else I tested, shedding only about 10 degrees in the two minutes after I got up. If you sleep hot, keep scrolling. If you wear socks to bed in July, congratulations, you found your mattress.

Trial: 100 nights · Warranty: 10 years

Best for side sleepers: Siena Memory Foam ($349)

Cheap mattresses have a bad habit of being firm slabs, which is fine if you sleep on your stomach, miserable if you don’t. The Siena is the exception. It’s a 10-inch, CertiPUR-US-certified memory foam bed with enough give at the shoulder and hip that I slept on my side without waking up sore.

It also runs the coolest of the bunch. The surface dropped more than 14 degrees within two minutes of me getting up, the fastest heat dissipation I measured. For a foam bed, that’s genuinely surprising.

Motion isolation was strong too: It passed the bowling ball test outright with the second-lowest vibration reading in the group. Edge support is the weak spot. The side sank a full 4 inches, though I never felt like I was rolling off.

Two warnings: The off-gassing smell was strong and still hanging around at bedtime, so unbox this one in the morning. And read the return terms: The 180-night trial is the longest here, but your refund is issued minus discounts, shipping, and white-glove fees.

Trial: 180 nights (with fine print) · Warranty: 10 years

Best for couples: Novilla Bliss 10-Inch ($250)

Edge support is the feature nobody shops for, and everybody notices. The Novilla Bliss had the best of any mattress here. The edge sagged just 2.5 inches under me, and lying on the perimeter felt like lying on the bed instead of a cliff. When your partner starfishes, that usable surface is the difference between sleeping and negotiating.

It passed the bowling ball test, though my vibrometer still picked up a fair amount of movement, so you’ll feel a restless partner get up. You just won’t get launched. It’s a softer-than-average foam bed that suits side sleepers best, and it’s the only mattress here with both CertiPUR-US and OEKO-TEX certifications.

Strict stomach sleepers should look at the Allswell instead. Ten inches of foam is the bare minimum for real support, and the Novilla sits right at that line.

Trial: 100 nights · Warranty: 10 years

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Best for all sleep styles: Zinus 12-Inch Green Tea ($295)

Zinus Green Tea Mattress

The Zinus Green Tea Mattress comes in a box that looks like this.

If you’re a combination sleeper or buying for a guest room where you have no idea who’s showing up, the Zinus Green Tea is the safe bet. It’s the rare budget bed that lets me sleep comfortably on my side, back, and stomach with no position feeling like a compromise.

It also ran the coolest through the night, climbing about 18 degrees while I slept versus a 20-degree average across the group. The edge sank 3 inches, and while I noticed a little sag rolling toward it, I never fell off. Motion isolation was fine, not great: It passed the bowling ball test about half the time. At 12 inches of CertiPUR-US-certified foam, it’s the thickest all-foam option here. Zinus sells thinner versions for less — don’t go below 10 inches, or you’ll feel the support disappear.

Trial: 100 nights · Warranty: 10 years

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Best splurge under $500: Novaform 14″ ComfortGrande Plus ($480)

This Costco exclusive is the best mattress you can get while technically staying under $500. At 14 inches, it’s the tallest bed I tested, and it posted the best motion isolation of anything here. It passed the bowling ball test with the lowest vibration reading I recorded. It suits every sleep position, and it’s the only one I didn’t notice an initial odor on.

The tradeoff is the perimeter: The edge sank 4 inches, and I felt like I’d roll off while lying on it. It also warmed up more than most overnight. The real selling point is Costco’s return policy, which in practice outlasts any sleep trial here.

Trial: Costco’s return policy · Warranty: 10 years

Three I’d skip

  • Lucid 10-Inch Plush ($350): The worst edge support I’ve measured, period: 4 inches of sag and an immediate falling sensation, plus a 30-night trial and a lingering smell.
  • Linenspa 12-Inch Hybrid ($430): Poor motion isolation, poor edge support, the biggest overnight heat buildup in the group, and only 30 nights to figure that out.
  • Sleepy’s Basic Innerspring ($220): No foam certifications, a 1-year warranty, the worst motion transfer I’ve ever recorded, and a return that costs $100 in delivery plus a 20% restocking fee. It also bounces more than any mattress I’ve tested, which is fun for exactly one demographic.

I tested the Dreamfoam Essential 6-inch, too. It’s fine for kids and petite sleepers and too thin for anybody else. And, for $600, you can get the Tuft & Needle Kin.

How I tested

best cheap mattress under 500 - in a bed showroom

Every mattress here got at least 14 nights of real sleep, plus the same tests:

  • Sleep quality: I wore a Garmin watch nightly and averaged the scores, so I had data to check my morning grogginess against. I’m 6 feet tall, 225 pounds, and a side sleeper who can sleep in any position.
  • Motion isolation: I dropped a bowling ball from 4 feet onto the bed, a foot from a soda can, and logged whether the can fell. A vibrometer measured how much movement traveled across the bed.
  • Heat: I took infrared surface temperatures before bed, first thing in the morning, and two minutes after getting up.
  • Edge support: I sat on the side and measured the sag with a yardstick then lay on the edge and rolled until I fell off.
  • The boring stuff: Setup time, off-gassing, certifications, and the fine print of every return policy and warranty.

What to look for in a cheap mattress

A long trial matters most. You can’t test these in a showroom, so 30 nights is a red flag, and 90-plus should be your floor. Read the refund terms, not the headline number.

Ten inches is the minimum thickness for a foam mattress that supports an adult. Below that, you’re buying a topper with delusions of grandeur.

Look for CertiPUR-US certification. Every mattress I recommend has it. If a bed doesn’t, that tells you what else got cut.

Match firmness to your position. Side sleepers and lighter people want softer; stomach sleepers and heavier people want firmer; back sleepers land in between.

FAQ

Is a mattress under $500 actually worth it? For a guest room, dorm, kid, or short-term apartment, absolutely. For the bed you’ll sleep on nightly for a decade, stretch to $1,000 or more if you can: better materials, longer trials, firmness options.

How long will a cheap mattress last? Plan on 6 to 8 years, versus 8 to 10 for a premium bed. Heavier sleepers will get less. When you wake up stiff, or you can see a body impression, it’s done.

Do cheap mattresses contain fiberglass? Some do, as a fire barrier. None of the beds I recommend use it. If a listing won’t say, email the company and make them answer.