# Expired Oath Promo Codes > Expired Oath promo codes that no longer work at checkout, kept here so you don't waste a try. The two codes that currently work are on the home page today. ## Expired Oath codes Old codes still get shared online long after they stop working. Here's what's dead, so you don't waste a try. | Code | Offer | Expired | Status | | --- | --- | --- | --- | | `OATHSAVE` | 10% off any order | 2026-04-02 | Expired | | `WELCOME15` | 15% off new accounts | 2026-01-15 | Expired | | `BULK50` | $50 off orders over $400 | 2025-10-30 | Expired | | `SUMMER2025` | 18% off sitewide | 2025-08-31 | Expired | Codes get shared and reshared long after they stop working. Someone posts one in a forum thread, and it's still floating around a year later even though it died the day it expired. Screenshots outlive the code every time, and search results don't know the difference between a code that works and one that used to. The codes below don't work anymore. This list exists so you don't waste a try at checkout typing in something dead, then wondering what went wrong. None of them are being tracked as active anywhere else on this site, and none of them should be trusted if you spot them somewhere out there. If you want a code that actually works right now, the two at the top of this site's home page do — checked, current, and not on this list. ## Why Old Codes Keep Showing Up Search results don't expire on their own. A page that mentioned a code eight months ago can still rank today, long after the code behind it stopped working. Screenshots get reshared. Old forum threads get bumped back to the top. None of that means the code still applies. Retailers change their active codes regularly, and research-chemical vendors are no different. A code tied to a single promotion or a limited window has a shelf life, whether it came from a big seasonal push or a small one-off deal. Once that window closes, the code doesn't come back later just because someone finds the old post about it. That's the gap this page exists to close. If a code isn't listed as working elsewhere on this site, treat it as dead. We'd rather you check here first than lose a few minutes at checkout on something that quietly stopped working months ago. ## What to Do Instead Skip the guesswork. This site tracks two codes that work at Oath Research checkout right now — one for new customers, one for everyone, including repeat orders. Both apply the same way: in the coupon box during checkout, before you enter payment details. Neither needs an account to see, and neither pays anyone a commission when you use it. That's it — no extra steps, no separate signup, no waiting around. If you landed here searching for an old code specifically, it's worth asking whether you need that exact one or just a working discount. Most people want the second thing, and this site's job is to keep pointing at whichever codes currently qualify. Either way, both current codes are right on the home page, one click away. There's no reason to hold onto an old code out of habit when a current one takes the same three seconds to enter. ## How This List Gets Updated Codes move to this list once they stop working. There's no fixed schedule for it — it happens whenever a code that used to apply no longer does, sometimes weeks after it actually stopped if nobody's tried it in a while. There's no way to predict which code goes next. Nothing here is a guess about what might expire next. It's a record of what's already dead, kept separate from the working codes so the two lists don't get confused with each other. Mixing them would defeat the point of keeping either one. If you're checking back to see what's changed, trust the working codes on the home page over anything else. This page is the archive, not the destination — useful for context, not for finding something that currently applies. Bookmark the home page instead, if you're going to bookmark anything on this site at all. ## Ready to use a code? Copy either code above, then paste it into the discount field at checkout. The 20% code is for first orders; the 15% code works every time. Shop Oath Research: --- This page tracks two Oath Research checkout codes and nothing else, and it takes no commission when you use them. © 2026 Oath Promo Codes. Codes checked before posting; no commission earned on either one.