Maybe you can’t take another night on a worn out mattress, guests are coming and your spare room is unfurnished, or your new dorm has a glorified cardboard box for a bed. You need a mattress fast — and we're here to help with the best mattresses on Amazon under $400 for a queen.
We’ve spent thousands of hours sleeping on the best mattresses you can buy online and the picks below come tested and approved by our experts. They’re also CertiPUR-US certified and have a wealth of positive customer reviews.
Amazon has become one of the most convenient marketplaces to buy a budget mattress and below are our top picks to browse today. But for all the latest sleep deals for every price bracket, check out our guide to the mattress sales.
Best queen mattresses on Amazon under $400 in 2025
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Best Amazon mattress under $400 overall
The Siena Memory Foam Mattress is a low-cost bed that goes above and beyond its small price tag. We rate this as the best cheap mattress overall, so we're happy to see it's available on Amazon, allowing more shoppers to try out this bed.
Created by Resident Home — the parent company behind the Nectar and DreamCloud, two of the best mattresses on Amazon — the Siena Memory Foam has a lot of sleep knowledge behind it. And you can tell. The all-foam bed offers impressive edge support, strong motion isolation, and surprisingly good temperature regulation: three features we rarely expect to see in a cheap memory foam bed. This all-round performance earned the Siena top spot in this guide.
During our testing period we found the Siena Memory Foam mattress has a firmer feel than expected, delivering full-body support. We think it's one of the best mattresses for stomach sleepers and it suits back sleepers as well. But although the pressure relief is decent there isn't a foam 'hug'. Side sleepers should opt for the softer comfort of the Zinus (#2) or the EGOHOME (#4).
Unusually for an Amazon mattress, the Siena also offers strong benefits. As well as a 10-year manufacturer's warranty, Siena provides a 180-night at home mattress trial. This is an opportunity to test the bed and see if it suits your sleep style without the financial commitment.
- Read more: Siena Memory Foam Mattress review
Best mattress on Amazon under $400 for side sleepers
The Zinus Green Tea Memory Foam mattress is a consistent Amazon best-seller, garnering thousands of reviews — most of them positive.
Available in four different heights, for most adults we recommend at least the 10" version. That's the height our sleep team tested and we found that for its exceptionally low cost the Zinus delivers a pressure relieving coziness that will appeal to side sleepers on a budget.
The Zinus has a relatively simple build, consisting of three layers of mattress foam — a similar design to many of the best memory foam mattresses we've tested. The upper layer has been infused with green tea to absorb moisture and neutralize odors for more hygienic sleep but approach these claims with a healthy skepticism. Infusions are unlikely to really make a difference to how a foam performs.
In our tests, we found the Zinus had a supportive, medium feel with that classic memory foam 'hug' — you sink into this mattress, rather than lying on top of it. Like all the best mattresses for side sleepers, the Zinus has contouring cushioning at the pressure points, helping relieve pain at the shoulders and joints.
The thick foams also help deaden motion, so if you share with a wriggler, this is a good budget choice. While comfortable for side sleepers, our testing panel was less impressed when front or back sleeping. The firmer Siena above is a better choice for those sleep styles.
Temperature regulation was an issue with our testers, as the mattress could get warm overnight. The Siena and the Linenspa below offer a cooler sleep environment but very hot sleepers should check out our guide to the best cooling mattresses (or for a cheaper option, a cooling mattress topper).
- Read more: Zinus Green Memory Foam Mattress review
Best hybrid mattress under $400 on Amazon
This Linenspa is a hybrid mattress with a simple build that provides light pressure relief and decent temperature regulation. The best hybrid mattresses rarely fall into this bargain price bracket, so if you're after a bed with a traditional feel, gentle contouring, and a wallet-friendly price, this is a good pick.
The Linenspa Memory Foam and Spring Hybrid Mattress is available in 8", 10" and 12" versions, and the deeper the mattress, the softer the sleep feel. Our expert review team tested the 8" version and found that the thinner, firmer build best suited young children and lightweight back or stomach sleepers.
Overall, we recommend upgrading to the 10" or 12" version if you have the budget and particularly if you're a side sleeper. These thicker designs add extra cushioning to enhance pressure relief and prevent aching shoulders (and even the 12" queen typically costs under $400).
The spring-heavy build gives the Linenspa a bouncier, responsive feel which is great if you enjoy freedom to move around in the night. However as a result the motion isolation is lacking — you can feel your partner toss and turn. The Siena that tops this guide is a better choice for bed sharers looking for firm support.
Note that stock is limited for this mattress at Amazon as of late, as most sizes and depths are currently unavailable — you might need to head direct to Linenspa for the complete line-up.
- Read more: Linenspa Memory Foam Hybrid Mattress review
Best cheap Amazon mattress for pressure relief
From popular mattress in a box brand EGOHOME, we recently got our hands on the EGOHOME 12" Memory Foam Mattress and found this all-foam bed offered comfort above its budget price tag.
Our lead tester is a lightweight side sleeper who often finds even medium mattresses too firm but the squishy, plush feel of the EGOHOME was just what she was looking for. It contours to the body to prevent pressure build-up so she can lie on her side all night long without worrying about numb shoulders.
This body-hugging feel does make it tough to change positions and the marshmallow effect can be divisive. While some love feeling cradled by their mattress, others prefer freedom to move around. If you fall into the later category, consider the Siena instead (we also recommend the Siena over the EGOHOME for back and stomach sleepers.)
One major advantage of slow-moving foams is motion isolation; this is a good mattress for bed sharers. But it can trap heat so if you have a tendency to sleep warm, consider upgrading to the hybrid model — with the increased air flow afforded by open springs, hybrids tend to feel cooler.
While you can sometimes find a lower price on the EGOHOME mattress shopping via Amazon, be aware you do sacrifice the trial and warranty. For these perks, you need to shop direct from EGOHOME.
Best Amazon mattress under $400 for RVS
Whether you're doing up a spare room, need a budget-friendly replacement for your current bed, or want to add some home comfort to your RV, the Dreamfoam mattress from Brooklyn Bedding has one of the most versatile size line-ups of any mattress we've tested.
That begins with the height options. The Dreamfoam is available in 6", 8", 10", 12" and 14" builds, with the price increasing as the size goes up. Taller sizes are also plusher so we recommend opting for 12" or 14" if you're a side sleeper (alternatively, consider the Zinus or EGOHOME.)
We also recommend opting for 10" or above if you plan on using the mattress every night. The reduced pressure relief is better for occasional use — for example, if you're looking for a new RV mattress.
Which brings us to the sizes. The Dreamfoam is sold in a vast range of dimensions, including many RV mattress sizes that are rarely covered by major retailers. However, for the complete line-up, you might need to head direct to the Brooklyn Bedding store. Amazon is often lacking the more exotic sizes.
Brooklyn Bedding is the brand behind top-rated mattresses such as the Aurora Luxe and the CopperFlex Pro, and the impressive support of the Dreamfoam is testament to its pedigree. Our testers did find the mattress was weak at the edges (the Siena is stronger here) but the motion isolation and temperature regulation are good, particularly for an all-foam mattress in this price bracket.
Also consider
These mattresses don't quite crack our top five, but these Amazon beds under $400 for a queen are still worth considering if you're shopping on a budget (plus some pricier choices we think are worth stretching your budget for.)
How we test Amazon mattresses
We take our sleep seriously at Tom's Guide and follow a rigorous mattress review methodology throughout the testing process. All our mattress reviews are editorially independent and not influenced by third parties.
Every mattress we review is slept on by a lead tester for at least three weeks, to allow their body to adjust to its feel. We also ask a larger review panel – consisting of testers with different sleep needs and body types – to try out the bed, for a well-rounded opinion.
In addition, we run a series of performance tests using objective and subjective measures. This takes place both at home and in our sleep studio, so we can properly assess how the mattress will perform for you.
We also compare our experience to the promises made by the mattress manufacturer as well as the reviews from real-world customers. This guides any further testing and can help us understand the long-term performance of the mattress.
We've spent thousands of hours testing mattresses and every new model we review is considered in comparison to other beds we've used and approved. When testing Amazon mattresses under $400 for a queen, we compare it to other mattresses in the price bracket — is it good or is it just cheap?
For Amazon mattresses we've yet to try, we rely on our testing knowledge and data from the manufacturer to come to an informed conclusion. We also vet reviews from verified Amazon shoppers as a way to spot trends among sleepers and consider mattresses that are perennial best sellers.
Best mattress on Amazon under $400: buying advice
Should you buy a mattress in the Amazon Prime Day sale?
The summer Amazon Prime Day sale is live from the 8th-11th July this year and while there are always some mattress deals to shop on Amazon, Prime Day typically brings an uptick in the offers.
In the October 2024 Prime Day sale, we spotted some massive mattress savings, including rare deals on top rated brands. Right now, the deals are primarily focused on budget beds, with money off already affordable mattresses.
That means if you have a small budget and you want to make the most of it, this is the time to shop. There are savings on mattresses for every sleep style and need, even among very tight budgets.
Now might also be the time to invest if you want to upgrade your spare room or you're heading off to college and want to to be one of the few well-rested students (and prioritizing sleep can help you learn.)
Prime Day deals are rarely static so if you can't spot a saving you like right away, keep on browsing. And don't worry if that sounds like a lot of work — our deals team will be finding all the best mattress sales for you.
Does Amazon sell mattresses and are they any good?
Yes, Amazon does sell mattresses and in recent years the marketplace has expanded to cover beds from some of our favorite brands. Top-rated well-known mattresses from Nectar, Casper, Tempur-Pedic and Purple are all now sold on Amazon.
Budget beds still dominate the Amazon best sellers, however, which means that bargain hunters can find some incredible deals. That said, we'd advise caution before clicking 'add to cart' on a mattress with minimal reviews and no name recognition, even if the price is rock-bottom. You could end up with a low-quality model that needs to be immediately replaced.
That doesn’t mean that the only mattresses worth buying on Amazon are from the upscale, more costly brands. Novilla and Classic Brands, for instance, may not be as well-known as Nectar, but these are considered some of the best mattresses on Amazon outright for their affordability and overall performance.
If you're opting to buy a more budget-friendly mattress from Amazon (or anywhere else for that matter), just make sure to do your homework. Know what type of mattress you need for your sleep, read the reviews (both good and bad), learn about the materials, and check the return and warranty policies.
How do you return a mattress to Amazon?
While most of our best mattress picks offer free returns within a trial period, returning a mattress to Amazon can be different – and sometimes confusing.
If the mattress is unopened, you can return it within 100 days of purchase. Just go to the Amazon Returns Center and select the 'Heavy-Bulk' option. If you’ve unboxed it, Amazon allows a refund request up to 30 days from purchase. What you'll be instructed to do with the opened mattress will vary – you may either be told to return it, keep it, or donate it.
If the mattress is from a third-party seller, there may be a different return policy, so check the Warranty and Support section of the mattress listing. Major brands with lengthy trials and warranties (such as Siena and Nectar) sell their mattresses on Amazon, and in the event of an issue, you'll want to reach out to those brands directly first to confirm your coverage.
How to choose the best mattress on Amazon under $400
Budget is obviously a factor if you're perusing this list but cost alone should not be how you find a new mattress on Amazon. Buying a bed just because it's cheap is likely to leave you with a mattress that doesn't suit your sleep needs, keeps you up at night and needs replacing quickly.
While we can't guarantee you'll get it right first time, weighing up your sleep preferences alongside your budget means you're more likely to find your dream mattress.
When it comes to finding the best mattress on Amazon for under $400, consider the following criteria...
- Your sleep style: Most people benefit from a medium-firm mattress, but side sleepers may be inclined for something more plush to cushion their hips and shoulders. Back and front sleepers may benefit from a firmer bed that'll prevent their mid-sections from dipping.
- Your body type: Generally, a heavier sleeper with a broad build will prefer something firmer than a lightweight, petite individual who needs a softer touch. However, firmness is subjective, which is why it's important to test your new mattress if possible (more on that below).
- Your sleep concerns: You'll also have to pay mind to your primary sleep issues. For instance, do you overheat at night, or share a bed with a restless partner? Seek a model that'll best address those issues.
There are some good mattresses on Amazon, but let's be honest: there are also some rubbish mattresses on Amazon. If you're in the super-budget category, it stands to reason you'll need to make some compromises on quality and design. However, there are a few key things you should expect, even for a very cheap mattress. Here's what to look for:
CertiPUR-US foams
A CertiPUR-US certification confirms the foams in your mattress meet certain minimum health and environmental standards. It's standard across all mattresses, even cheap ones, and we'd consider it a red flag if a mattress' foams weren't CertiPUR-US certified.
If it's not mentioned on the Amazon product entry, check the company website, because sometimes things like that can get missed off the Amazon listing.
A depth of at least 10 inches
If you're wondering how thick your mattress should be, most adults need at least 10 inches in order to get the comfort and support they need. Heavier individuals (250lb+) might need something thicker, while children and petite / lightweight individuals can find thinner models deliver ample support.
For a spare room, however, you might be able to get away with a thinner mattress. Although long-term guests might develop some aches and pains, overnight visitors and brief vacationers should be able to sleep comfortably.
And a thinner mattress can also work in an RV, where space is at a premium and thicker designs can overwhelm the room.
Warranty and returns policy
Most Amazon mattresses don't come with a proper sleep trial. While you might not be able to return your mattress, there should be a returns process for faults. Look for warranty information on the product listing page, as well as double-checking what happens if you need to return your mattress to Amazon.
If you're buying a name-brand like Casper or Nectar via Amazon, you might be eligible for the brand's trial period, but make sure you check and jump through the required hoops to get that activated.
Alternatively, consider spending a bit more and buying direct from a known bed brand — most of today's best budget mattresses (all under $500 for a queen size) come with a trial period of at least 90 nights.
Foam that's a least 1.8lb
Foam quality is indicated by its density, measured in pounds. Denser foams are higher quality, more durable...and more expensive. This is an important spec, but it's last on our list because it's impossible to figure out – in the vast majority of cases, brands won't publish this information.
If you can find the info, ideally you want your comfort layer (the top tier of the mattress that defines the sleep feel) made with foam that's at least 1.8lb. According to mattress manufacturing expert Tim Dilworth, this is the minimum density to look for in a mattress, if you want it to be comfortable and to last (you'll find more insights from Tim in our memory foam density guide).
That's especially true for bed-in-a-box mattresses because the compression process puts the foams under stress, and poor quality foams are less likely to recover properly.
Reliable reviews
While good reviews won't guarantee a mattress is right for you, reading the reviews can help you avoid a dud.
We recommend heading to Tom's Guide mattress reviews to check whether we've tested a bed you might have your eye on. But we recognize we haven't tested every mattress sold on Amazon — reliable third-party sites (even those not affiliated with us) are often the best place to look for an unbiased review.
On Amazon there is generally a wealth of user reviews to search through. You can typically often find the most useful information in three- to four-star reviews, although it's worth paying attention to any one- and two-star reviews that repeatedly encounter the same problem.
When's the best time to buy a mattress on Amazon?
You might expect that the Amazon Prime Day deals events, a two-day sales extravaganza exclusively for Amazon Prime members (or those taking advantage of the free trial), would be the best time to buy a mattress from Amazon. But in all honesty, good Prime Day mattress deals have been very few and far between.
In the 2024 events (Summer and Fall), we did see some interesting discounts, including money off Nectar and Leesa mattresses. Bedding accessories, such as mattress topper deals and pillow deals, often yielded the best savings. Interestingly, a number of bigger brands have started running their own 'Prime Time' events to coincide with Amazon's sale.
The generic Amazon mattresses in this ranking do sometimes attract further discounts, as evident in this year's Amazon Big Spring Sale, but there's no real pattern to when we'll see price drops. Unfortunately, it's just a case of keeping an eye on the listing if you're really determined to snag a discount. We will highlight any significant offers that do arise though.
Should you buy a cheap mattress on Amazon?
Whether or not you should buy a cheap mattress on Amazon depends on what you're looking to get out of it.
For example, if you're moving into a forever home then you might want to invest in something more durable, since you'll want it to last a long time. However, if your mattress is for a seldom-used guest room or a kid's bedroom, a cheaper mattress should suffice. If you need a mattress for your main bedroom ASAP, a cheap mattress from Amazon will help fill that need before you can expand your budget and purchase something longer-lasting.
It's also important to keep in mind that Amazon doesn't offer mattress trials, unlike the brands themselves, which could be a downside. Mattress brands such as Nectar and Zinus offer their own trial periods. Most budget-priced mattresses don't provide such an amenity, either, regardless of where you buy.
We suggest checking the Warranty and Support section of the mattress listing on Amazon or contacting the manufacturer directly to find out if their trial and return policies apply to third-party purchases. This will help you avoid any headaches that may arise from a possible return scenario.
