“Deposit bonus code” is sportsbook language: fund an account, type a string of letters, watch a percentage match land on top of whatever went in. Polymarket does not have that product on either of its two platforms, and the deposit that does matter works nothing like a reload match.

What a Deposit Is Actually For

On Polymarket US, a deposit exists to clear one threshold: $10, minimum, once, on an account that was opened through a referral link or an existing user’s username. Clear that bar along with identity verification and the $25 credit described on the Polymarket bonus code page posts. The size of the deposit past that floor changes nothing — there is no scaling table, no percentage, no ceiling tied to dollars in.

One gate, not a formula. A sportsbook deposit bonus multiplies with the deposit. Polymarket US’s $10 threshold is binary: clear it and the flat $25 posts, don’t and it doesn’t. There is no version of this where depositing more produces more.

Repeat Deposits Don’t Repeat the Bonus

A second or third deposit into an already-funded account triggers nothing. The credit is attached to completing one referral, not to the act of depositing itself — a user can add money to the same account for months without ever seeing another $25 land, because the account already cleared the threshold once. The only way to generate more credit is a fresh referral, up to Polymarket US’s cap of 14 per user.

What triggers it: $10+ deposit, after signing up via referral link or username, after identity verification.

What doesn’t change it: deposit size above $10, number of later deposits.

International site: no deposit-linked bonus; fee-share referral for high-volume traders only.

Same Mechanic, Different Label

Pages advertising a “deposit bonus code” separately from a “welcome bonus code” are almost always describing the identical referral offer under a different name, because both terms get search volume and one program answers both queries. There is no evidence of a distinct reload promotion sitting alongside it on either Polymarket platform.