Birthday gifts for son-in-law: 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 son-in-law — 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
For the son-in-law’s first birthday you attend
A small gift from someone who barely knows him lands better than an expensive one. The first birthday together is the wrong moment to try to prove you are already family.
$10–$25
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$25–50
When he is also the father of your grandchild
The birthday after his first child is born changes what the gift can mean. He is now doing something in your presence that you have opinions about — fathering — and the safest gift is the one that acknowledges that without evaluating it.
$25–$50
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$50–100
For a son-in-law, the gift is welcome, not a test
The gift here is not for him alone — it is a small message about how you two will get on. The trap is making him earn it by naming an interest specific enough for you to buy for.
$50–$100
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$100–250
Years in, he is one of yours
Somewhere between the fifth and the tenth year the son-in-law tension dissolves and you can buy the same size gift you would buy a son. The trick is doing so without turning it into a speech.
$100–$250
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Also worth a look
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.