There is a particular week I know well. The caterer calls for a number. The kitchen table is covered in reply cards, some crisp, some coffee-ringed, one returned with a pressed flower inside. And on the laptop sits a spreadsheet with eleven rows still blank.
So when should RSVPs be due for a wedding? It is one small printed line, "kindly reply by," and the last month of planning leans on it. Plates, chairs, escort cards, the favor order, the florist's centerpiece count: all of them wait on the same answer.
There is no magic number. What there is, is a calm way to find yours: set the date backward from the one deadline you don't control, word it so nobody can miss it, and have a kind plan for silence before you need one.
When Should RSVPs Be Due for a Wedding?
The published advice lands in the same neighborhood, though not on the same house. The Knot says replies should be due at least four weeks before the wedding and no later than two, with a sweet spot of three to four weeks. Brides also says three to four weeks. Emily Post suggests a reply-by date usually two to three weeks before.
The differences come down to two things: when your vendors need final numbers, and how many people you will end up chasing.
My own default for a local wedding is about four weeks out. That fits the three to four weeks in our guide on when to send save-the-dates and the "at least four weeks" in our modern guide to wedding etiquette.
Why not give people longer, or less? Brides puts it simply: give guests too much time and they procrastinate, too little and they may make other plans. The Knot adds that a date set very far from the wedding can lead guests who aren't yet sure of their plans to decline.
Work Backward From the Caterer's Number
The date that truly rules your RSVP is in your catering or venue contract: the day your final headcount is due. Find it early, and if it isn't spelled out, ask your caterer or venue coordinator to put it in writing. Every other date in this piece is built from that one.
Then my rule of thumb as a planner: leave one to two weeks between your RSVP date and that headcount date. That gap is where your follow-up lives. The Knot's own timeline fits this shape, with the deadline about four weeks out, follow-ups starting about a week after it, and the final count going to vendors about two weeks before the wedding. The Knot's headcount guide says the count should be ready "within a few days of your RSVP deadline," once the stragglers are in.
Here is how that looks on a real calendar:
- Wedding: Saturday, June 12, 2027
- Final headcount due to the caterer: Saturday, May 29 (two weeks before)
- RSVP date: Saturday, May 15 (four weeks before)
- Gentle reminder: Saturday, May 8
- Paper invitations in the mail: by Saturday, April 17 (eight weeks before, the longer end our save-the-dates guide suggests for paper reply cards)
And count everyone. The Knot reminds couples to include themselves, "even at a sweetheart table" (or a head table; see sweetheart table vs head table), plus vendor meals, children as a separate count, and ceremony-only guests separately from the reception.
What That One Date Holds Up
The Knot's timeline and headcount guide together read like a list of everyone waiting on you. The caterer's food, drink, and staffing. Table settings and entrées, and meal choices if you asked for them. Rentals. The seating chart. Escort cards, along with the names and table numbers a calligrapher or stationer may want even before the caterer does. Favors. The florist, the cake baker, transportation.
A few of those have their own guides on this site:
- Escort cards vs place cards, which reminds you to proof names against your final RSVP list.
- Do you need wedding favors and do you need wedding programs, for order and print quantities.
- The wedding day timeline, where the final count lands on the day itself.
- The wedding budget checklist, because every seat has a price.
Here is what I want you to see: all of these are waiting on the same answer. A late RSVP date doesn't delay one task. It squeezes every one of them into the same week.
How to Word the Deadline on the Card and the Website
Emily Post describes the reply card's whole purpose as giving you an accurate count for the reception. She suggests including a "reply by" date, pre-addressing and stamping the return envelope, and noting an email address or phone number if you'd rather take replies that way. The Knot suggests putting the date on both the invitation suite and the wedding website, and offering more than one way to reply.
My own wording principles are short. Use a full date, with the weekday if there's room. Never use a relative phrase like "four weeks before the wedding," which asks guests to do math. Give one clear way to answer on each piece. And make it the same date everywhere.
A few lines of my own you're welcome to borrow:
- Formal card: "Kindly reply by Saturday, the fifteenth of May"
- Simple card: "Please let us know by May 15"
- With a meal choice: "Kindly reply by May 15 / ___ will be there ___ will be missed / Dinner: ___ beef ___ fish ___ garden"
- Wedding website: "Please reply by Saturday, May 15. On the 29th we give our caterer the final count, and we'd love to know you're in it."
- Phone or text, for a small wedding: "Reply by May 15 to Ana at (555) 010 2244"
You can also simplify. For a small or casual wedding, a website-only or phone-only RSVP is perfectly fine. The only real requirement is that every guest knows how to answer and by when.
When Invitations Go Out Too Early or Too Late
Invitation timing has its own home in our save-the-dates guide, so just the short version here.
Too early, and the stretch between the invitation arriving and the RSVP date grows long. The Knot warns that guests put it off and forget, and Brides says the same about procrastination.
Too late, and guests get a cramped window to answer while your follow-up time shrinks. Brides frames invitations at six to eight weeks before the wedding as giving guests about a month to reply.
If you're running late, don't slide the RSVP date. Keep it tied to the caterer's date, and make up the time with a note on the website and a personal message to anyone you think might need it.
Destination Weddings
Travel changes the math. Brides suggests RSVPs due two months before a destination wedding, with invitations going out about four months before, because guests need time for flights and rooms.
An earlier count helps you too. Brides notes it gives you a sense of when people arrive and leave, so you can plan any gatherings around the wedding, like a rehearsal dinner or welcome party. And if you have a hotel room block, ask when unbooked rooms are released. That date can matter as much as the caterer's.
A Calm, Kind Plan for Guests Who Don't Reply
Some guests will not answer. It is almost never personal, and you are far from the first couple to wait on a few replies. Cards get lost in the mail, The Knot points out, and good people get busy. So assume good faith, and follow a plan.
1. A gentle reminder before the deadline. The Knot suggests a reminder about a week before replies are due, by message or with a note on your website. Something like: "Just a little nudge: replies are due Saturday, May 15. We'd love to know if you can come."
2. After the date, a personal note with a firm "by." The Knot suggests waiting about a week after the deadline before following up. If your gap before the headcount is tight, I start a few days after. Emily Post advises keeping the message simple and asking for an answer within a short window. For example: "We haven't heard back about June 12, and we give our caterer numbers soon. Could you let me know by Thursday, May 20?"
3. A phone call. In my experience, a real voice gets answers that a text never does. You don't have to make every call yourself. Emily Post suggests your partner, your parents, or your attendants can help.
4. Count them as not attending, and say so in writing. The Knot notes that if couples can't get an answer, they may eventually assume a guest isn't coming. My own practice is to send a short, warm written note so nobody is surprised later: "We weren't able to reach you, so we've given the caterer our count without you this time. We'll miss you, and we hope to celebrate together soon." This isn't an uninvitation. The Knot is clear that uninviting a guest isn't okay. It is simply telling them where things stand.
What if a late yes arrives after the count is in? Emily Post says it's up to you, though she recommends making it work whenever you can. On the guest side, she says changing a no to a yes is only okay if it won't upset the hosts' arrangements. In practice, your caterer's policy decides what's possible, since The Knot notes that additions after you submit depend on the vendor.
When do you stop? On your headcount date. Give your vendors the number, update the seating chart, and let it be finished. You did your part, kindly and clearly.
FAQ
When should RSVPs be due for a wedding?
The Knot and Brides suggest three to four weeks before the wedding, and Emily Post suggests two to three. Work backward from your caterer's headcount date.
How long after the RSVP deadline should you follow up?
The Knot suggests about a week. Start sooner if your headcount is due soon after your RSVP date.
What should you say to guests who haven't replied?
Keep it brief and warm, and give a specific date you need an answer by.
When can you count a guest as not coming?
After your final follow-up and before your headcount is due. Tell them kindly, in writing.
When should RSVPs be due for a destination wedding?
Brides suggests two months before the wedding.
How soon should you RSVP for a wedding as a guest?
Emily Post says within a day or two of receiving the invitation, and by the deadline at the latest. The Knot suggests mailing a paper card about a week before it's due.
Before the invitations go to print:
- When is our caterer's final headcount due?
- Is our RSVP date one to two weeks before it?
- Is the same full date on the card and the website?
- Is there more than one easy way to reply?
- Who will help make follow-up calls?
- What will our "we've counted you out" note say?
The RSVP date is a small line of type holding up a great deal of your wedding. When it's set well, no one notices it at all. The plates are right, the cards are spelled correctly, and the room fills exactly as planned.
So keep it as simple as you like. A short guest list, a phone tree run by your mother, or a single page on your website all do the job. What matters is knowing who is coming, so every chair waiting at your tables has someone's name on it.