Hilton's top-end Amex card comes with a $550 annual fee, but the built-in credits can claw most of that back. The biggest is the $400 annual resort credit, and it's also the perk people most often get wrong.

The credit arrives in two chunks: $200 between January and June, and another $200 from July to December. Each half applies to purchases at participating Hilton resorts only — regular Hilton hotels don't count. It works against the room rate or on-property spending, but the purchases have to be charged to your room and settled on the Aspire card at check-out. Paying the spa directly with the card won't trigger it, and neither will buying through a third party. Bring the physical card too, since mobile or wireless card readers can apparently interfere with the credit posting.

A few quirks worth knowing. The credit can't officially be applied to advance-purchase or non-refundable rates, though plenty of travellers report these sometimes still trigger it anyway — more often at resorts outside the US. Don't rely on it, but don't be shocked if it works. Credits can take 8-12 weeks to appear on your statement, and because eligibility is based on the transaction date, using the credit in the last few days of June or December risks it landing in the wrong half-year. No registration is needed; just make the right kind of purchase. And note that Small Luxury Hotels properties bookable through Hilton don't qualify — that partnership is marketing only, not actual Hilton ownership.

There are ways to squeeze out more value. Couples who each hold the card can split a hotel bill at check-out — $200 to one card, the rest to the other — doubling up on a single stay. If a booking falls in one half-year but the stay falls in the next, some resorts will let you pre-pay a portion via a credit card authorisation form, effectively banking the credit early. And for a serious double-dip, you can combine the Aspire credit with the Amex Platinum's $600 annual hotel credit, using one toward the room rate at a Fine Hotels & Resorts property and the other toward incidentals.

For lighter cardholders, the cheaper Hilton Amex cards offer smaller but more flexible credits: the Surpass and Business Platinum give $200 a year in quarterly $50 instalments, and the Hilton Business card gives $240 in quarterly $60 chunks. Unlike the Aspire's resort-only credit, these work at any Hilton property worldwide, which makes them far easier to use if your hotel stays are city-based. You can stack them with the Aspire credit on the same stay by splitting the bill.

Is it worth chasing? The card's author reckons using the credit once a year, plus the $200 airline credit, free night certificate and Diamond status, easily covers the fee — but won't book a Hilton resort purely to unlock a $200 credit. If you already stay at Hilton resorts a couple of times a year, the credit is close to free money. If not, a lower-fee Hilton card may be the smarter pick.