Birthday gifts for sister: what people actually spend
People spend $55.65 on an adult's birthday gift on average — per Empower, 2025. Every idea below carries its own price range and the date we checked it, so you can see where it sits against that.
This is the national figure for an adult's birthday gift, not a breakdown for a sister — no published survey we could find breaks spending down by relationship, and the per-relationship numbers you will see elsewhere carry no source.
Under $25
Something only you would know to give her
You have decades of material nobody else has. The book you both read as kids, the sweets from the shop near the old house, the reference no one else would get.
$10–$40
checked
$25–50
A gift for the life she has now
Siblings freeze each other at the age they last lived together. This is the deliberate correction: buy for who she is this year, not who she was when you shared a bathroom.
$25–$70
checked
$50–100
The boring thing she keeps putting off buying
The proper suitcase, the office chair that does not hurt, the mattress topper. Unromantic, unphotogenic, and used more than anything else she gets this year.
$45–$150
checked
$50–100
Removing the distance, when you live apart
If the honest problem is that you never see each other, spend the money on that rather than on an object to post. A train fare beats a parcel.
$50–$160
checked
$100–250
One good gift, split between siblings
Three of you at the typical spend each buys something none of you could justify alone — and it quietly solves the comparison problem that makes sibling gifts awkward.
$100–$400
checked
Why the ranges, and why the dates
An exact price stops being true within weeks, and a list full of stale prices is worse than one with none — it looks precise while quietly misleading you. So each idea is published as the band it falls into, with the date we last checked, and you can judge how much weight the date still carries.
The spending figure is the more durable number and the more useful one. It answers the question behind the question: not what to buy, but whether the amount you had in mind is generous, normal, or thin for this particular relationship.