Who pays for a birthday dinner? Three ways to split it

Who pays for a birthday dinner?

The person who invited decides, and there are three conventions. Which one applies depends on whether you are hosting, organizing for a friend or only coordinating a night out.

1. The host treats. Emily Post puts it plainly: “Once you issue an invitation, you are the host, which means you are paying, even at a restaurant.” If you wrote “We’re hosting a dinner”, guests would be right to assume it is on you.
2. The guests cover the guest of honor. When friends organize a night out for someone’s birthday, Emily Post says “It’s the group’s responsibility to split the honoree’s tab among them.” The birthday person does not pay, and the other guests share their cost.
3. Everyone pays their own. This works when you are only a coordinator, as in an ordinary night out. Emily Post’s wording is “You need to make it clear that you are the coordinator, not the host”, so that everyone understands they are paying for their own meal. When the dinner is organized to celebrate the birthday person, her guidance is the second convention.

Your own birthday has its own rule. If you are the one who suggested the dinner, Emily Post says it is up to you to offer to pay for your own meal.

What does covering the birthday person cost each guest?

Say the check comes to $312.50 for 8 people, tax and tip included, and the birthday person is one of the 8.

• Everyone pays: $312.50 divided by 8 is $39.0625. Six people pay $39.06 and two pay $39.07, so the shares add up to $312.50.
• The 7 guests cover the birthday person: $312.50 divided by 7 is $44.6428. Five guests pay $44.64 and two pay $44.65, which adds up to $312.50.

Each guest pays about $5.58 more to cover one person. The extra grows as the table shrinks: it is the check divided by the headcount times one fewer than the headcount, or $312.50 divided by 56 here.

What if everyone ordered something different?

Then use a by-item version, where the birthday person’s items are spread equally over the guests and everyone pays for their own. Say the birthday person, Dana, ordered items that came to $50.00 with tax and tip, out of the $312.50. The 7 guests’ own items, with tax and tip, came to $262.50, which is $37.50 each on average.

Dana’s $50.00 divided by 7 is $7.14, and two guests pay $7.15 to use up the last 2 cents. Each guest pays their own total plus that slice:

• A guest whose own items came to $25.00 pays $32.14.
• A guest at the average, $37.50, pays $44.64, the same as the even split.
• A guest whose own items came to $56.25 pays $63.39.

The totals still add up: $262.50 for the guests’ own items plus Dana’s $50.00 is $312.50. For the method in more detail, how to split a restaurant bill runs one check through four approaches.

What should the invitation say?

Say the rule in the invitation, not at the check. Emily Post notes there is no good way to send an invitation that tells guests to be prepared to pay for their own meals, so if people will pay their own way, it suggests calling instead of sending invitations. Wording that fits each convention:

• Host treats: “We’re hosting a birthday dinner for Dana at Rossi’s on Saturday, Nov 7, at 7 pm. Dinner is our treat.”
• Guests cover the honoree: “Dana’s birthday is Saturday. Want to meet us at Rossi’s at 7? We’ll split the check evenly and cover Dana’s dinner.”
• Everyone pays their own: “Want to meet us at Rossi’s at 7 on Saturday? It happens to be Dana’s birthday. We’ll ask for separate checks, so everyone pays for their own meal.”

If the group covers the birthday person, say so in the message. A guest who hears it at the table has had no chance to say yes.

How do you split it in EvenOut?

For an even split with the birthday person covered:

1. Add the check. Tap “Add expense”, type $312.50 and choose “Paid by” the person who paid.
2. Leave the birthday person out. Choose “Equally”, then tap the birthday person to leave them out (“Not in”). EvenOut shows each remaining share, and it shares out any leftover cents.
3. Record the payments. Each guest taps “Settle up” and “Record payment” when they pay. EvenOut records the payment and does not move money.

For the by-item version, choose “By item” and add each dish as a line with chips for who had it. Put the birthday person’s dishes on the 7 guests and each guest’s own dishes on that guest, with each person’s share of tax and tip folded into their lines as in the example above. The items must add up to the expense total. A friend who is not on EvenOut can be added through “Add a guest” in a group, and you invite them later.

What should you do next?

Settle the convention before the invitation goes out, then use the numbers above to estimate each guest’s share. A split bill calculator with tax and tip does the arithmetic for your check, and what to say when people disagree about the check helps if the table sees it differently.