Every subreddit runs on two layers of law. There's Reddit's sitewide policy, the stuff that applies everywhere and gets you in trouble with the whole platform. Then there's the local layer: the specific subreddit's own rules, written by its own moderators, enforced however that particular team of volunteers feels like enforcing them. Most people who get removed or banned never broke Reddit's actual policy. They broke a house rule they never bothered to read.
That distinction matters because the fix is completely different depending on which layer you tripped. Sitewide violations follow your account everywhere. Subreddit rule violations usually don't. But newcomers treat every removal like a catastrophe, panic, and either give up on Reddit entirely or make it worse by arguing with a moderator in the modmail queue. Neither reaction helps. What helps is knowing where the rules live, what they usually say, and how to check before you hit submit.
Where the rules actually live
Every subreddit has a rules list, but it's rarely front and center. On desktop, it's typically in a sidebar or a "Community Info" panel. On mobile, it's tucked under the About tab or a menu that most people never tap. If you've only ever browsed a subreddit's front page and never clicked into its About section, there's a good chance you've never actually seen its rules.
Pinned posts are the second place to check. Many communities pin a "read before posting" thread, a weekly megathread that absorbs certain kinds of content, or an FAQ that answers the questions moderators are sick of fielding. If a subreddit has a pinned post sitting at the top of its feed, assume it's there because ignoring it causes problems.
The third and most overlooked location is the wiki. Bigger or more established subreddits often maintain a full wiki page, sometimes linked from the sidebar, sometimes only findable by adding /wiki to the subreddit's URL. Wikis tend to hold the dense stuff: detailed formatting requirements, historical context on why a rule exists, or exhaustive lists of banned topics that would never fit in a short sidebar bullet.
None of this takes long to check. Five minutes reading a rules page before you post is nothing compared to the time you'll spend appealing a ban or rewriting a post that got removed for something you didn't know was against the rules.
The rule categories that trip up newcomers
A handful of rule types account for most first-time removals, and they repeat across thousands of subreddits with slight variations.
Self-promotion limits are the big one. Plenty of communities cap how often you're allowed to post your own content, sometimes phrased as a ratio (your posts shouldn't dominate your activity) and sometimes as a flat restriction on links to your own site, channel, or product. If a subreddit exists partly to prevent itself from turning into a wall of ads, it will have some version of this rule, and it's usually one of the first three listed.
Minimum account age or karma thresholds are next. A lot of subreddits, especially ones that have dealt with spam or brigading in the past, won't let brand new accounts post at all. The account might need to be a certain number of days old or have accumulated some amount of karma before the subreddit's automated systems will even let a submission through. This is invisible until you hit it: you write a post, hit submit, and it just vanishes with no explanation on the page itself.
Required post flair catches people constantly. Some subreddits force every submission into a category, chosen from a dropdown, before the post is allowed to stay up. Skip it and the post either gets auto-removed or a moderator removes it manually and asks you to resubmit. It's a small thing but it's an easy miss if you're used to subreddits that don't require it.
"No low-effort content" rules are vaguer and therefore more dangerous. These are subjective by design, meant to stop meme dumps, one-line text posts, or content that looks copy-pasted. Because the definition is fuzzy, this is the rule most likely to get you removed even when you thought you were contributing something reasonable.
Formatting requirements show up in more technical or hobbyist communities: a required title structure, a mandatory template in the post body, specific image requirements, or a ban on certain file types. Ignore the format and the post gets pulled regardless of how good the content underneath it is.
Day-of-week restrictions are a smaller but real category. Some subreddits only allow certain post types on specific days, things like self-promotion threads, "advice needed" posts, or meme content, corralling them into a designated day so the rest of the week stays focused. Post the wrong type on the wrong day and it comes down immediately, even though the identical post would've been fine 24 hours later.
Duplicate and repost rules round things out. If your topic has already been posted recently, or if you post the same thing to the same subreddit twice, expect a quick removal. Some communities are lenient here, others treat it as a bannable pattern if it happens repeatedly.
Why automod removes things a human never sees
A huge share of these removals aren't done by a person sitting there reading your post. They're done by Reddit's automated moderation bot, generally referred to as automod, which subreddit moderators configure with a set of conditions: banned keywords, account age thresholds, karma minimums, missing flair, links from certain domains, title patterns, and dozens of other triggers.
This matters because it changes how you should think about a removal. If automod pulls your post, no moderator necessarily read it, agreed with it, or judged it. A pattern matched a rule, and the system reacted instantly, often within seconds of you hitting submit. That's why a post can vanish with zero explanation, or with only a generic bot-generated comment pointing at a rule you may not have known existed.
It also means the fix is often mechanical rather than personal. If your account is too new, waiting and building some genuine activity elsewhere solves it. If a flair was missing, adding it and resubmitting solves it. If a word in your title tripped a keyword filter, rewording solves it. Getting angry at a bot, or assuming the subreddit hates you personally, wastes energy that could go toward just reading what actually triggered the removal.
Removal versus ban: two very different outcomes
A removed post is the mild outcome. It means your submission didn't meet a rule, automod or a moderator took it down, and in most cases that's the end of it. Nothing else happens to your account. You can read the rule, adjust, and try again, either with an edited version of the same post or with something new.
A subreddit ban is heavier. It means the moderators of that specific community have decided you, personally, don't get to participate there anymore, whether temporarily or permanently. This usually happens after repeated rule violations, a single serious one, or behavior that looks like it's working against the subreddit's purpose rather than just missing a formatting requirement. Arguing with moderators after a removal, ignoring warnings, or trying to repost something that already got taken down are common ways a simple removal escalates into an actual ban.
The two outcomes look similar from the outside, both involve your content disappearing and a notification you'd rather not see, but they carry very different weight. Removals are corrective. Bans are punitive and carry consequences for that specific community going forward.
Local bans don't follow you anywhere else
Here's the part that trips people up most: a subreddit ban is local. It applies to that one community and nowhere else. Get banned from one subreddit and your account works completely normally everywhere on the rest of the platform. You can still post in other subreddits, comment, vote, and use your account exactly as before. The moderators of one community have no authority over any other, and a ban from them doesn't get reported, shared, or flagged to other subreddits.
This is a fundamentally different mechanism from a sitewide suspension, which comes from Reddit itself rather than a volunteer mod team and does affect your entire account across every community. Confusing the two causes a lot of unnecessary panic. Getting banned from a single subreddit for breaking its posting rules is inconvenient if you cared about that specific community, but it isn't an account-level problem, and it isn't something that follows you into other spaces. That's a separate and more serious topic on its own, covered in more depth in the piece on Reddit vote manipulation and account bans, which deals with sitewide enforcement rather than the subreddit-level rules covered here.
A practical pre-post checklist
Before submitting anything to a subreddit you're not deeply familiar with, run through this quickly:
Check the About section or sidebar for the full rules list, not just a skim of the top post. Look for a pinned post at the top of the subreddit and read it if one exists. Check whether the subreddit has a wiki, especially for anything with detailed formatting or content guidelines. Confirm whether flair is required and pick the correct category before you post rather than after. Look for any stated limit on self-promotion or links, and if your content could be read as promotional, err toward less frequent posting. Check whether your account meets any stated age or karma minimum; if the rules don't say, assume there might be an unwritten one anyway if you're brand new. Search the subreddit for your topic first to make sure you're not duplicating a recent post. Match whatever formatting or template the subreddit asks for, exactly, rather than approximately. If today has a specific designation for certain post types, check it before you post something that might belong on a different day.
None of this guarantees a post won't get removed. Moderators change rules, automod configurations drift, and some calls are genuinely subjective. But most removals and most bans come from skippable mistakes: not reading the sidebar, not noticing the pinned post, not checking for required flair. Reading the room before you post is still the cheapest insurance available on Reddit, and it costs a fraction of the time you'd spend cleaning up after a ban. For the broader picture on building a presence across subreddits without triggering these problems in the first place, the Reddit marketing guide covers subreddit selection, timing, and content strategy at a wider level than this piece does.