How to Stack Spends and Get More Miles on Your Credit Card (2026)

Maximising credit card miles isn’t just about spending more—it’s about spending smarter. If you’re a Singaporean miles chaser, you’ve probably heard about “stacking” your spends to squeeze out every last mile from your cards. But with new rules, tighter exclusions, and frequent changes to rewards programs, the old tricks don’t always work any more.

This step-by-step guide will walk you through how to stack your spends effectively in 2026, avoid common traps, and make sure every dollar counts. Whether you’re booking a flight, paying your tax bill, or just shopping online, you’ll learn how to combine cards, platforms, and categories to get the most miles possible—without falling into costly pitfalls.

Ready to make your miles work harder for you? Let’s dive in.

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Step 1: Know your card’s rules and merchant category codes (MCCs)

Before you can start stacking for more miles, it’s crucial to know what actually counts as a qualifying spend on your credit card. Banks in Singapore use merchant category codes (MCCs)—4-digit codes that classify the type of business you’re transacting with—to determine if you’ll get bonus miles, the base rate, or nothing at all.

Two transactions that look similar on the surface can be treated very differently by your card issuer. For example, booking a hotel online might be classified as “travel” rather than “online retail”, which often means you miss out on bonus miles—even if the purchase felt like regular shopping. Always check your card’s terms and conditions for the exact MCCs that qualify for higher earn rates. Don’t assume that “online spend” will automatically earn bonus miles.

If you’re ever unsure about how a merchant codes your transaction, you can check your monthly card statement or ask your bank directly.

ALSO READ: Here’s One Thing You’re Not Tracking About Your Miles Card

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Step 2: Pick the right card for the right spend

No single credit card will earn bonus miles on every type of transaction. Most cards in Singapore reward specific categories—such as dining or online shopping—but exclude others. The trick is to match your card to each spend, so you always earn the highest rate available.

For example, use a card that offers extra miles for dining whenever you’re at a restaurant, and a different card for online retail. Keep in mind that many common transactions, like mobile wallet top-ups, insurance premiums, government payments, and travel bookings, are typically excluded from bonus categories.

Review your card’s rewards guide and check your statements to see where your bonus miles really come from. By paying attention to the details, you avoid missing out on rewards or being caught by exclusions.

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Step 3: Add the right payment platform when it makes sense

Some payment platforms and aggregators in Singapore let you earn miles on payments that typically wouldn’t qualify for card rewards. The 2 most common options are Amaze and CardUp. Both can help you unlock extra miles, but it’s important to weigh the rewards you earn against any fees or limitations involved.

Amaze

Amaze serves as a bridge between your physical card and the merchant, sometimes allowing you to earn miles where you normally wouldn’t. Since 2025, Amaze has introduced a 1% fee (minimum $0.50) for local SGD transactions. This can quickly eat into the value of your miles, especially for smaller transactions or if you aren’t stacking with a bonus-earning card.

CardUp

CardUp is popular for larger payments like tax, rent, or insurance premiums—expenses that are usually excluded from rewards. While CardUp charges a processing fee (commonly 2.25% for Visa/Mastercard and 2.6% for Amex), you’ll typically earn miles at your card’s base rate. This approach can work out if you’re comfortable with the “cost per mile” and intend to redeem your miles for higher-value rewards.

There are also aggregator tools such as HeyMax that work with selected banks and credit cards to help users earn HeyMax miles on eligible card transactions (sometimes called “heymax cc” transactions). While tools like these can help track or combine rewards, always consider the terms, potential caps, and any changes to partner offers before relying on them as part of your stacking strategy.

Payment platforms and aggregators can play a supporting role in your miles-earning game, but your decision should come down to careful maths. Always compare the fees, bonus rates, and exclusions against the actual value of the miles you’ll earn before adding another layer to your stack.

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Step 4: Watch for fees, bonus caps, and statement cycle traps

Even if your spend qualifies for miles, it’s easy to lose out on value if you don’t pay attention to the fine print. Many rewards cards in Singapore cap the number of bonus miles you can earn each statement month—once you hit that cap, further spending drops to the lower base earn rate.

Some platforms and cards also charge processing or admin fees, which can quietly erode your rewards. Always factor in these costs before stacking.

It’s also important to remember that statement cycles may not align with calendar months. A big transaction just before your statement closes could push you over the bonus cap and leave you earning at the base rate, so consider timing larger purchases accordingly.

Before stacking, do the sums:

• Check for bonus caps (e.g. 9,000 bonus points per statement month on certain cards)
• Add up all fees (card, platform, or admin charges)
• Double-check if your planned spend actually falls within the qualifying period

By keeping an eye on the details, you’ll avoid losing miles to small print or spending that only looks rewarding on the surface.

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Step 5: Don’t ignore miles devaluation

Earning more miles is only part of the equation—what matters just as much is what your miles can buy when you’re ready to redeem. Airlines can update their redemption charts at any time, sometimes requiring significantly more miles for the same flight or upgrade.

For instance, KrisFlyer raised the miles needed for most long-haul and premium cabin awards by 5% to 20% in late 2025, while some short-haul Economy redemptions became slightly cheaper. This means if you’re paying fees to “buy” extra miles, a devaluation can wipe out the value you were aiming for.

To get the most from your stacking:

• Keep up with redemption rate changes for your preferred programmes
• Plan to use your miles regularly rather than hoarding them
• Always include the true “cost per mile,” factoring in fees and devaluations, when deciding if a stack is worthwhile

Smart stacking considers both how you earn and how you spend—so you don’t get caught out when the rules change.

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Step 6: Test your stack with real scenarios

Don’t just assume a stacking method works—run the numbers with your own transactions before you commit. Calculate how much you’re actually paying in fees and how many miles you’ll earn for that spend. Then, work out your “cost per mile” and compare it to what you’d pay buying miles directly or using a cashback card.

Try this with real-life examples:

• How many miles will you earn for a $1,000 online retail purchase with your chosen card?
• If you use a payment platform like CardUp for a $5,000 tax bill, how much will the fees add up to, and what’s your true cost per mile?
• If you’re considering an aggregator like HeyMax to earn HeyMax miles via a linked credit card, check whether the platform fees or earning caps affect your bottom line.

Testing with real scenarios lets you spot hidden costs and ensures your stack is genuinely rewarding—not just in theory, but in your actual day-to-day spend.

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Step 7: Review and adapt your approach regularly

Credit card rewards programmes, payment platforms, and aggregator tools update their terms and partnerships all the time. What works well for stacking miles today could change with a new fee, a bonus cap adjustment, or an update to eligible categories.

After a few months, review your last several transactions:

• Did you earn the rewards you expected?
• Were there any surprise fees or exclusions?
• Has your cost per mile crept up because of recent programme changes?

Use this review to tweak your strategy. Switch cards if the earn rate drops, try a new platform if the maths works out, or simply sit tight if your current setup is still delivering value. Stacking isn’t a “set and forget” game—the savviest miles chasers keep adapting as the landscape evolves.

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Bonus Tip: Pay your card in full—always

No stacking strategy is worth it if you’re paying interest. Even 1 month of interest charges can wipe out months of rewards, turning your “free” miles into an expensive mistake. The most valuable miles are the ones you earn without giving anything back to the bank—so set up reminders or a GIRO payment, and always clear your full statement balance every month.

ALSO READ: Best No Annual Fee Credit Cards in Singapore 2026

Conclusion 

Stacking credit card spends for more miles is about more than chasing the highest earn rate—it’s about understanding the rules, calculating the real costs, and being ready to adjust as programmes change.

To get the most from your stacking strategy:

• Audit your next few transactions for MCC, bonus rates, fees, and the miles earned.
• Work out your true cost per mile and check if it still beats cashback or a simpler rewards card.
• Use payment platforms and tools like Amaze, CardUp, or HeyMax only when they add value after all fees are counted.
• Keep up with changes to your cards and airline programmes, and adapt your approach as needed.

The smartest miles chasers know it’s the details—and not just the hacks—that make stacking worthwhile. Take a few minutes to review your habits, and make every dollar count.

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This article was first drafted with the help of AI and later reviewed and refined by the author.

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