Welcome bonuses and points-earning rates get all the attention, but the quiet reason many frequent travellers hold a wallet full of credit cards is the perks themselves — benefits you get just for carrying the card, no spending required. A recent rundown from One Mile at a Time highlights the six categories worth the most, and they're worth knowing whether you're building a US card portfolio or just wondering why your friend gets free breakfast in Bangkok.

Top of the list is automatic hotel elite status. The Hilton Honors Aspire card ($550 annual fee) grants Hilton Diamond status outright, while the Marriott Bonvoy Brilliant ($650) does the same for Marriott Platinum — no qualifying nights, no spend thresholds. Neither tier is transformative at home, but recognition tends to improve noticeably the further you travel from the United States, which is exactly when a guaranteed late checkout or lounge entry feels most valuable.

Next are anniversary free night certificates, which can single-handedly cover a card's fee. The Hilton Aspire's certificate has no cap on redemption value — potentially worth up to 250,000 points at top properties. Marriott's Brilliant card offers a night worth up to 85,000 points (toppable with 25,000 more), the Marriott Business version is worth 35,000, IHG's Premier gives 50,000 with unlimited top-offs, and the World of Hyatt card covers any Category 1-4 property.

Less glamorous but arguably more useful: travel protection. Trip delay, lost baggage and rental car coverage kick in when things go wrong — the Chase Sapphire Preferred and Reserve are cited as the standouts. You hopefully won't use these 99% of the time, but a cancelled flight or damaged rental is when you'll be glad you had them.

For couples or families, cheap authorized-user lounge access is an underrated win. The Citi Strata Elite charges $75 per authorized user for a full Priority Pass membership; Bilt's Palladium does it for $95; the Citi/AAdvantage Executive covers up to three users for a flat $175 total (under $60 each for Admirals Club access); and Chase Sapphire Reserve's $195-per-user fee at least bundles Priority Pass, Capital One-rivaling Chase Sapphire Lounges and Air Canada Lounges.

Bilt's cards carve out a unique niche by earning points on rent, mortgage and HOA payments — spending most cards ignore entirely.

Finally, if premium cards feel like homework, the Capital One Venture X ($395) is pitched as the easiest to justify: a $300 annual travel credit plus 10,000 anniversary miles (worth at least $100) gets you to breakeven with one portal-booked flight a year, and everything else — Priority Pass, Capital One Lounge and Landing access — is effectively gravy.

The takeaway for travellers: before your next big trip, it's worth checking whether a card's standing perks — status, a free night, lounge access for your travel companion, or insurance you'd otherwise buy — could quietly pay for themselves.