Do RSVP Cards Need Stamps? Wedding Etiquette & Money-Saving Guide

The devil is often in the details when it comes to wedding planning.

You’ve already sorted out the venue, wedding dress, and even the menu, but as you prepare to send out that thick stack of beautiful invitations, a small but troubling problem arises:

Do I need to put a return stamp on that little RSVP envelope beforehand?

Each stamp costs $0.73 (current USPS rate), which adds up to nearly $150 extra if you invite 200 guests. Is it really necessary?

To help you make a decision, we consulted wedding planners and etiquette experts and compiled this ultimate guide for you, incorporating modern trends.

Short answer: Yes, you should post it.

According to traditional wedding etiquette, prepaying RSVP postage is an obligation of the host.

Hospitality: Since you invited people to the party, you shouldn’t make them pay for it, even if it’s just a few cents, just to “tell you they’re coming.”

Convenience is paramount: A more practical reason is that you don’t want your uncles and aunts to delay (or even forget) sending back their cards because they “can’t find the stamps” or “are too lazy to go to the post office.”

Etiquette experts agree that if you’re providing physical reply cards and envelopes, pre-stamping is standard practice. This not only shows thoughtfulness but is also the best way to ensure you receive the guest headcount on time.

Modern Exception: When is it okay not to post it?

Of course, the rules for 2025 are much more flexible than those for 1925. You can skip this step in the following situations:

Online Only: If your invitation only has a QR code or wedding website link (TheKnot/Zola) and you don’t provide a physical reply card, then you don’t need a stamp.

Hybrid approach: You provide physical cards but primarily encourage online responses. Even so, it’s still wise to affix stamps to some cards to accommodate older guests.

Why does affixing stamps increase the response rate?

This involves a simple psychological principle.

When guests open the envelope and find a reply card already filled in with an address and a pretty stamp, they simply check “attend” and drop it in the mailbox. Resistance is virtually zero.

If they have to find the stamps themselves (who keeps stamps at home these days?), the card will likely end up sitting on the kitchen counter until you have to awkwardly text them a week before the wedding to ask about it.

Conclusion: Pre-affixing stamps is not just a courtesy but also for your own convenience.

Even if we have to apply it, how can we save money?

The good news is that following etiquette doesn’t mean breaking your budget. Here are three strategies to stay respectable while significantly reducing RSVP postage costs:

Strategy 1: Use postcard-style RSVP (Postcards)

You can design your reply card as a postcard, eliminating the need for a reply envelope.

Advantages: Postcard postage is usually cheaper than regular mail (about $0.56 vs. $0.73).

Note: Even postcards must conform to USPS size standards.

Strategy 2: Purchase discounted Forever Stamps

This is the smartest “hacking” trick. Instead of buying stamps at full price at the post office, buy discounted Forever Stamps at the [Sale Discount Stamp] section.

Calculation: Our discounted Forever Stamps are typically cheaper than USPS postcard postage!

Instructions: You can directly affix one of our discounted Forever Stamps to the RSVP envelope.

Result: You received the same treatment as a standard letter for less than the price of a postcard. It saved you money and made you look “generous” (because you used full-value postage).

Strategy 3: Don’t just affix national flag stamps

Since you’ve already spent the money, let it become part of the design. Instead of sticking on a boring flag stamp, choose one of our Love or Floral collections.

Visual consistency: Choose stamps that match the color scheme of your invitations.

No extra fees: Here, the beautifully designed stamps are priced the same as, or even lower than, the regular ones.