Momyknows Discount Code SAVE30 is a publicly shared discount code for the maternity fashion brand Momyknows, advertised as giving up to 30% off when you type SAVE30 into the promo field at checkout on momyknows.com. Because it is a public code rather than a personal one, there is nothing in the way it is structured that automatically locks out someone who has already placed an order. Whether a returning shopper can actually use it comes down to conditions that the brand has not published, which is why this article approaches the code from the returning customer's side of the counter: what you can reasonably expect, what you cannot assume, and what to do at the checkout screen if the discount does not land.
Why the type of code matters for returning customers
Not all savings codes treat repeat buyers the same way, and the category a code falls into tells you a lot before you even reach the basket.
A discount code, which is what SAVE30 is, is a short alphanumeric string shared openly. Anyone who knows the string can type it in. It is not bound to your identity, your email address or the person who told you about the shop.
A referral code is personal to an existing customer and usually rewards two parties: the person who shared it and the person who used it. SAVE30 is not that kind of code, so there is no friend to credit and no reciprocal reward on either side.
A voucher normally carries a fixed cash value that you spend down. SAVE30 is a percentage reduction instead, so what it is worth scales with the size of your basket.
A coupon, in current online usage, is simply another name for a discount code. Seeing SAVE30 called a coupon somewhere is a naming convention, not a different offer.
The practical upshot for someone who already has an account is encouraging: you do not need an invitation, an introduction or a fresh sign-up to try SAVE30. You need the string spelled correctly in the right field. What you do not get, as an existing customer, is any special claim on the code beyond what a first-time visitor has.
What existing account holders can claim
On the facts that are published, a returning shopper's position is the same as anyone else's. The code is entered at checkout, the basket total drops by whatever proportion the code applies to the items chosen, and the ceiling on that reduction is 30%. If the code applies fully to a basket, you pay 70% of the pre-discount figure, meaning roughly three tenths of the total comes off. That arithmetic does not change based on how many orders you have placed before.
What existing account holders do have is better information than a new shopper. If you have ordered before, you already know how the brand's sizing ran for you at a particular stage of pregnancy, you know how the packaging and fabrics felt in person, and you have a previous order total to compare against. That makes it far easier to judge whether the post-discount number on screen is genuinely good. A first-time buyer has to take the headline on trust; you can measure it against something.
What you cannot assume
Several conditions that would normally decide a returning customer's eligibility are simply not published anywhere reliable for SAVE30. Specifically, it is not known whether the code carries a first-order-only restriction, whether there is a minimum spend, whether it has an expiry date, or whether it excludes sale items, nursing bras, swimwear or plus sizes. It is also unclear whether SAVE30 interacts in any way with the free-shipping threshold.
That list of unknowns is the single most important thing for an existing customer to absorb. It means you cannot calculate your saving in advance, and it means a rejection message is not necessarily a sign that something is broken. The honest position is that the checkout is the only authority. Enter the code, read the order summary, and treat the number on screen as the real offer with 30% as the upper bound rather than a promise.
A checkout routine for repeat buyers
Confirm you are on momyknows.com and check the spelling in the address bar. Momyknows has one "m" in the middle. A separate company with a similar-sounding name sells maternity health supplements and is not the same business, and SAVE30 will not apply there.
Build the basket you actually want across the categories you need, rather than hunting for items to justify the code.
Re-read the size guide at /pages/size-guide even if you have ordered before. Maternity sizing changes as a pregnancy progresses, so the size that fitted on your last order is not automatically the size that fits now.
Open the cart or the checkout page and find the field labelled discount code, promo code or coupon. On many stores it sits on the payment step or inside a collapsible panel next to the order summary, so expand anything that looks closed.
Type SAVE30 exactly, with no leading or trailing spaces. Codes are usually case-insensitive, but pasting from a web page can drag an invisible space along with it and cause a rejection that has nothing to do with eligibility.
Apply the code and read the summary line by line. You want to see a discount line and a revised subtotal, not just a confirmation banner.
Check the shipping position after the discount, then pay only if the final total is a number you are comfortable with.
The shipping trap that catches returning shoppers
Momyknows states free shipping on orders of $79 or more, which also confirms that prices are in US dollars. This matters more for repeat customers than it might seem, because experienced shoppers often know roughly what they want and build a tighter basket rather than browsing widely. A percentage code reduces your subtotal, and a lower subtotal can drop you back beneath a free-shipping line you had comfortably cleared before the discount was applied.
So if your pre-discount basket sits only a little above $79, check whether the post-discount figure still clears the threshold and whether any shipping charge that reappears cancels out part of what you just saved. This is a matter of reading the order summary rather than trusting the moment the discount line appears.
Alternatives if the code will not apply to your order
If SAVE30 is rejected or reduces your total by less than you hoped, there are still sensible moves available that do not depend on the code at all.
Consolidate instead of splitting. A percentage discount returns more on a larger basket, and a larger basket is also more likely to clear the $79 shipping threshold. Combining an event outfit with everyday pieces in one order is usually better value than two small orders.
Shop across the full range rather than a single category. The catalogue covers baby shower outfits including plus sizes, photoshoot dresses in lace, boho, beach, mesh and sequin styles, gender reveal outfits, general maternity tops, bottoms, dresses and jumpsuits, nursing tops, bras, dresses and pyjamas, and maternity swimwear with cover-ups. If the code turns out to exclude a category, there may be another that it does cover.
Let the free-shipping threshold do the work when the discount will not. Reaching $79 removes a cost entirely, which is a known, published saving rather than an uncertain one.
Read the returns and refund policy at /pages/return-and-refund before ordering. For maternity clothing, where a garment that fits at one stage may not fit weeks later, the return terms often matter more to the outcome than the discount does.
Judging the offer as a returning customer
SAVE30's strength is breadth. The brand was founded by a young mother-to-be who found the maternity options available during her own pregnancy neither stylish nor comfortable enough, and it now describes its approach as pairing fashion designers with parenting experts, with an emphasis on high-quality fabrics, attention to detail and precise tailoring. Recurring silhouettes across the range include maxi, bodycon, lace, floral and off-shoulder. That spread means a repeat buyer can usually build a basket worth discounting rather than searching for something to spend a code on.
Its weakness is transparency. Without published exclusions, minimum spend or expiry, no existing account holder can know in advance whether the code will work on their particular basket. The unglamorous approach is the effective one: build the order you want, check the size guide and the returns page, enter the eight characters, and let the total on screen decide. If the reduction is real and the shipping position still holds afterwards, the code has done its job. If the number barely moves, you have lost only the seconds it took to type it.
Promotional terms, eligibility and values are set by the provider and can change at any time. Always confirm the current terms on the official site before signing up or completing a purchase.