The Water Library at Central Embassy has two KTC routes from 1 September 2026 to 31 August 2027. All KTC credit cards can receive 10% off qualifying à la carte and set-menu food when the food spend reaches THB 2,000 on one sales slip. Drinks, tax and service charge sit outside that calculation.
Eligible KTC Mastercard holders can instead qualify for later cashback after registration: THB 400 on a THB 5,000 sales slip or THB 1,000 on a THB 10,000 sales slip. The routes have different card, registration and settlement rules, so choose before asking for the bill.
How To Use It
For the instant route, identify the eligible food total and pay with a KTC credit card. For cashback, register the KTC Mastercard once before or on the first qualifying transaction, receive confirmation, then meet one published spend threshold on a single sales slip. Confirm eligibility before the bill closes, because the campaign period alone does not make every card, item, branch or payment route eligible.
What To Check
The 10% reduction excludes drinks, taxes and service charges and does not accept KTC PROUD. The cashback route is for eligible KTC Mastercard products, pays within the stated settlement window, removes normal points on qualifying spend and carries daily and campaign caps. Keep the itemised receipt and any reservation or registration confirmation until the benefit is settled. Resolve a mismatch before payment whenever possible.
Is It Worth It
The instant route is clearer for a smaller meal that already passes THB 2,000 in qualifying food. The cashback route becomes relevant for a larger party, but only if the group naturally reaches THB 5,000 or THB 10,000 and accepts the registration and delayed-credit conditions. Compare the final payable amount with a normal direct purchase, including tax, service charge, transport and any points surrendered. A high percentage is useful only when the purchase already makes sense.
Plan The Visit
Reserve directly with the restaurant, confirm the Central Embassy branch and ask whether the planned menu counts as à la carte or set-menu food. Before ordering, clarify minimum spend, exclusions, tax, service charge, deposit treatment and whether special menus can use the KTC benefit. Recheck availability on the day because quotas, seating, stock and operating details can change. Do not add an unwanted purchase simply to reach a threshold.
After Payment
Save the The Water Library campaign page and photograph the receipt while it is readable. Check that the discount, treatment, points deduction or later credit matches the method you confirmed. Refunds, cancellations and chargebacks may reverse a benefit. If anything is missing, contact the merchant and card issuer promptly with the receipt and confirmation.
Practical Information
- Campaign dates: 1 September 2026 to 31 August 2027.
- Instant saving: 10% off qualifying food from THB 2,000 per sales slip.
- Cashback route: THB 400 from THB 5,000 or THB 1,000 from THB 10,000 for registered eligible KTC Mastercard holders.
- Location: Central Embassy, Bangkok.
- Map: Open in Google Maps
Questions
Does the 10% saving cover drinks?
No. The published instant discount excludes drinks, tax and service charge.
Is cashback automatic?
No. The eligible KTC Mastercard must be registered within the published timing and receive confirmation.
Can the bill be split?
Plan on one qualifying sales slip and confirm any restaurant-specific condition before payment.
Can KTC PROUD use the food discount?
No. The published normal-discount terms exclude KTC PROUD cash cards.