Return policy comparison · 2026
Bluemercury vs Kosas
Policy data verified July 21, 2026 (Bluemercury) and July 24, 2026 (Kosas)
Winner
Bluemercury
A-
4.0 / 5.0 · Very Good
Kosas
B+
3.4 / 5.0 · Good
The verdict
Bluemercury has the more generous return policy in 2026, grading A- (4.0/5.0) against Kosas's B+ (3.4/5.0). It wins 1 of 5 scoring axes; the biggest gap is the return window: 90-day window (above average) versus 30-day window (industry standard).
Score breakdown
Five axes, 5.0 points total — the same deterministic grader behind every Thrifle policy page.
BluemercuryKosas
Return window · worth 2.0
Restocking fee · worth 1.0
Return shipping · worth 1.0
Holiday window · worth 0.5
Transparency · worth 0.5
Key terms side-by-side
| Bluemercury | Kosas | |
|---|---|---|
| Return window | ✓ 90 days (original payment method; gift card only after 90 days) | 30 days (full-size items, kosas.com orders only) |
| Free returns | Yes | Yes |
| Restocking fee | — | None |
| Return shipping | — | Free returns on full-size products ordered directly from kosas.com |
| Holiday extension | — | None published |
| Non-returnable | — | Samples (final sale), items purchased from retail partners (Sephora, Ulta, etc. must go through that retailer) |
| Watch-out items | — | — |
Bluemercury tip
Exchanges can only be done in-store, not by mail, so mail-in returns are refund-only even if you wanted a swap; after 90 days a refund converts to store credit (gift card) instead of cash back to your card.
Kosas tip
Buy from kosas.com directly if you want return flexibility — anything picked up at Sephora or Ulta has to be returned through that retailer's own policy instead, not Kosas.
Frequently asked questions
Who has the better return policy, Bluemercury or Kosas?
Bluemercury has the more generous return policy in 2026, grading A- (4.0/5.0) against Kosas's B+ (3.4/5.0). It wins 1 of 5 scoring axes; the biggest gap is the return window: 90-day window (above average) versus 30-day window (industry standard).
What is Bluemercury's return window?
Bluemercury's return window is 90 days (original payment method; gift card only after 90 days).
What is Kosas's return window?
Kosas's return window is 30 days (full-size items, kosas.com orders only).
Does Bluemercury or Kosas offer free returns?
Bluemercury: Yes. Kosas: Yes.