The short answer is: In Sioux Falls, South Dakota, your landlord has to give you at least 30 days' written notice before raising your rent. But here's the thing—there's a lot more nuance to this than just "30 days and you're done."
What does the law actually say about notice?
Look, South Dakota's landlord-tenant law is actually pretty straightforward on this one. Under SDCL 43-32-13, your landlord needs to give you written notice of any rent increase, and that notice has to come at least 30 days before the increase takes effect. That's your baseline protection.
Now, the thing that trips people up is what "written notice" actually means. Your landlord can't just text you or mention it in passing.
It's gotta be actual written communication—an email counts, a printed letter counts, even a notice posted on your door in the right way counts. But a casual conversation? That doesn't cut it.
When can your landlord actually raise your rent?
Here's where it gets interesting for Sioux Falls specifically. Your landlord can raise your rent whenever your lease allows it. (More on this below.) If you're in a month-to-month situation, they can raise it basically whenever they want—as long as they give you that 30-day notice. If you're locked into a lease for a year, they can't touch your rent until that lease ends (unless your lease specifically says otherwise, which would be unusual).
So your protection really depends on what you signed. If you're month-to-month, you're more vulnerable to increases. If you've got a fixed-term lease, you're locked in.
What happens if your landlord doesn't give proper notice?
Okay, this is the part where things get real. If your landlord tries to raise your rent without giving you the full 30 days' notice, the increase isn't legally valid in most situations. You're not automatically obligated to pay the new amount.
But—and this is a big but—you need to actually do something about it. This is where a lot of tenants mess up. They get angry, they ignore the notice, and then they end up in a dispute they didn't need to have. Here's what actually happens if you don't act: Your landlord might try to evict you for non-payment if you refuse to pay the increased rent. Then you've got an eviction case on your hands, and even if you win because the notice was bad, you've now got an eviction filing on your record. That's going to make renting in Sioux Falls a lot harder going forward.
So what should you do instead? If you think the notice is improper, document it and respond in writing. Keep copies of everything. If you're concerned about the legality of what they're doing, reach out to a tenant rights organization or a lawyer. Don't just stonewall on rent.
Is there any limit on how much they can raise it?
Real talk—South Dakota doesn't have rent control. There's no state-level cap on how much your landlord can increase your rent. They could theoretically raise it by 50% if they wanted to, as long as they give you that 30 days' notice.
Sioux Falls city ordinances don't add any additional rent increase restrictions either. So the only real limit is what the rental market will bear and what you're willing to accept. If the increase is outrageous, your option is to move, not to refuse to pay. That might feel unfair (and honestly, it kind of is), but that's how South Dakota law works.
What about the timing of when notice needs to end?
This matters more than you'd think. The 30-day notice period has to end right when the new rent amount takes effect. So if your landlord gives you notice on January 15th, the new rent can't start until February 15th at the earliest. If they're trying to make it effective February 1st, that's not enough notice, and the increase isn't valid.
You need to actually pay attention to the exact date on the notice. Most disputes happen because someone miscalculated the 30 days and didn't realize they got shortchanged. Write it down. Count it out. If it doesn't add up, you've got a legitimate complaint.
What if you're in a lease that has a rent increase clause built in?
Some leases include automatic increases—like a 3% bump every year. That's generally fine in South Dakota, as long as it was in the lease you signed. But your landlord still usually needs to give you notice of when that increase happens, even if the amount was predetermined. Check your lease carefully. If it spells out the increase and the timing, you're on notice already (literally). But if it's vague, your landlord should still give you that written 30-day notice. — at least that's how it works in most cases
The practical stuff you actually need to do
When you get a rent increase notice, don't ignore it. Read it carefully. Make sure the math is right on the 30-day window. If something seems off, write it down immediately. Take a photo of the notice or save the email. Keep it somewhere you won't lose it.
If you think the notice is legally improper, contact the South Dakota Tenants Advocates or a legal aid organization. They can help you figure out if you actually have a valid defense. What you don't want to do is refuse to pay based on a hunch and then lose an eviction case. The cost and hassle aren't worth it.
And look—if the increase is just more than you can afford, that's a different problem than a legal problem. You might need to start looking for a new place. That sucks, I know. But at least you'll have 30 days' notice to make that plan.