Before You Send a Single Invite

Talk with your partner about vision and budget firstTalk about your goals, aspirations, and timeline for your future together, and use that conversation to guide decisions on venue, food, drinks, and decor.
Decide who's hostingTraditionally the bride's parents host, but now anyone can host: friends, both families together, coworkers, or the couple themselves.
Lock in a rough wedding guest list before finalizing this oneThe single most important rule in engagement party etiquette is to invite only people who will also be invited to the wedding — this rule is foundational and not flexible.
Keep the party list at or below the eventual wedding listIf someone attends the engagement party but isn't invited to the wedding, they will feel snubbed; there's no graceful way to undo that later.
Consider two smaller parties instead of one big one if families live far apartFor couples whose families live in different cities or states, hosting a single event that requires distant relatives to travel can create stress and cost, so two smaller, intimate parties — one in each family's hometown — are an increasingly common arrangement.
Set the date within a few months of the proposalThis party is often hosted close to the actual engagement, as a kick-off to the wedding planning that will ensue.
Pick a venue near where most guests liveChoose a venue where the majority of your guests live, for example your parents' hometown.
Confirm who is paying for whatThe one rule that never changes: whoever hosts, covers all costs — guests are never asked to pay for their meals, drinks, or any portion of the event. If the budget's tight, scale the format down rather than splitting costs with guests.

Setting the Format

Choose a style that fits the couple and guest mixOptions range from a relaxed backyard BBQ or cozy pub get-together, a chic cocktail party, to a sophisticated formal dinner party.
Set a start and end timeGive guests a two to four-hour window so they know when to arrive and depart.
Estimate guest count to guide the budgetA typical engagement party hosts twenty-five to fifty guests: immediate family, the wedding party, and closest friends, though it can run larger.
Book the venue or space once headcount and date are setDo this early if you want a restaurant buyout or private room, since good dates go fast.

Invitations

Send invitations while the engagement still feels freshInvitations should be delivered when the engagement is still fresh, anywhere from a week to three months after the accepted proposal.
Include the essentials on the inviteBesides date, time, and location, include the attire, who is hosting, and how to RSVP.
Choose formal mailed invites vs. e-invites based on toneInvitations can be printed on fancy cardstock and formally mailed, or if it's a more casual affair, evites and phone calls will suffice so long as everyone knows when and where to gather.
Leave registry information off the invitationEngagement party gifts are optional and should never be requested or expected, and registry information should not be included on the invitation — if guests ask directly, you can share it, but the party is the celebration, not a gift-giving occasion.

Two to Four Weeks Out

Track RSVPs and finalize the headcountConfirm numbers with the venue or caterer so orders and seating are accurate.
Confirm the menu, drinks, and any rentalsTables, chairs, glassware, whatever the venue doesn't supply.
Arrange a toast or short speech if the format calls for one if format includes toastAsk a parent or close friend ahead of time so no one's caught off guard.
Book a photographer or assign a friend to take photos if want photo recordIf you want a record of the night beyond phone snapshots.
Plan a simple decor and music planMatch the chosen style — nothing elaborate is expected for this event.

Week Of and Day Of

Confirm final numbers with the venue or catererSo nothing is over- or under-ordered.
Pick up or confirm delivery of any rentals, flowers, or cake
Brief whoever's giving a toast on rough timingSo it happens at a natural lull, not mid-meal.
Reconcile the final bill and pay before or right after the eventIf you're the host, so there are no awkward follow-up invoices to guests.
Send thank-you notes within a couple of weeks after the partyFor anyone who brought a gift, even though gifts weren't required.

Planning a Wedding Engagement Party

Before You Send a Single Invite

Setting the Format

Invitations

Two to Four Weeks Out

Week Of and Day Of