Most people use their credit card and get 2–5% back. The people who know how the system works are getting 15–30% back on the same purchases. The difference is stacking — layering multiple reward mechanisms on a single transaction.

Here's exactly how it works, and how to do it.

The Stacking Framework

There are four independent reward layers that can often apply to a single purchase:

Base card earn rate (e.g., 3x on dining)
Shopping portal bonus (e.g., 5 points/$ through Chase Ultimate Rewards portal)
Card-specific offer (e.g., $15 back on $75 at a specific merchant via Chase Offers or Amex Offers)
Retailer promotion (e.g., buy one get one, discount code)

The key insight: these layers are almost always additive, not exclusive. The credit card company doesn't care that you're also going through a portal. The portal doesn't know about your card offer. Stack all four and you're playing a different game.

Layer 1: Base Card Earn Rate

Your starting point. Choose the card based on the purchase category:

Category	Top Card	Earn Rate
Travel	Chase Sapphire Reserve	3x on travel and dining
Dining	Amex Gold	4x at restaurants
Groceries	Amex Gold	4x at U.S. supermarkets (up to $25K/yr)
Gas	Citi Premier	3x on gas stations
Everything else	Citi Double Cash	2% cash back
Online shopping	Amazon Prime Visa	5% at Amazon

This is table stakes. You should always be earning at least 2x on every dollar spent.

Layer 2: Shopping Portals

Shopping portals are websites operated by credit card programs, airlines, and cash-back sites that pay you extra rewards when you click through to a retailer. The portal gets a referral commission from the retailer and shares part of it with you.

Major portals to know:

Chase Ultimate Rewards Shopping — earns UR points on top of card points
Amex Membership Rewards Shopping — same concept, stacks with Amex card earn
Rakuten — cash back or Amex MR points (you choose); the most widely-used cash-back portal
Capital One Shopping — cash back portal, works with any card
Topcashback / BeFrugal — cash back portals, often highest rates for specific merchants

How to use portals:

Before any online purchase, go to the portal (or use the browser extension)
Find the retailer
Click through
Complete purchase normally

The portal tracks your click and credits rewards. The timeline is typically 30–90 days after the purchase confirms.

Portal stacking tip: Chase and Amex portals can't both apply to the same transaction (you can only click through one). But Rakuten can stack on top of Chase or Amex card earn because Rakuten is a third-party service. Pay with your Chase Sapphire Reserve after clicking through Rakuten → you earn both Rakuten cash back AND Chase UR points on the same purchase.

Layer 3: Targeted Card Offers

This is where most people leave serious money on the table.

Chase Offers

Chase Offers are merchant-specific deals loaded directly to your Chase credit or debit card. They show up in your Chase app under "Offers for You" and are targeted based on your spending behavior.

How to find them: Chase app → tap your card → scroll to "Offers for You"

Typical offer structure: "$15 back when you spend $75 at Marriott" or "5% back at Best Buy, up to $25 back"

You activate the offer (tap "Add to Card"), then make the purchase with that card. The credit posts automatically — usually within 5–10 business days.

Amex Offers

Same mechanic, slightly different execution. Amex Offers live on your Amex account and must be "enrolled" before the purchase.

How to find them: Amex app → card → Amex Offers; also shows up at amex.com/offers

Amex Offers are often more generous in dollar terms, especially for travel brands (airlines, hotels) and luxury retailers.

Pro move: If you have multiple Amex cards (e.g., Amex Gold + Amex Platinum), the same offer may appear on each card. Add it to both. Use one card for the first qualifying purchase and the other for the second. You just doubled the offer.

Layer 4: Retailer Promotions

Never make a purchase without checking for active promotional codes. BeFrugal, RetailMeNot, and Honey aggregate these. Capital One Shopping's browser extension does it automatically.

This layer doesn't interact with the card reward system — it's just reducing the purchase price before the other layers apply. If an item costs $100 and you have a $10 code, you're now earning card points and portal cash back on $90.

Real-World Stacking Examples

Example 1: Hotel Booking

Purchase: $300 hotel stay at Marriott

Layer 1: Amex Gold earns 3x MR on hotels → 900 MR points (~$9 value at 1 cpp)

Layer 2: Book through Amex Travel portal → extra 2x MR points (for Amex Platinum holders) → 600 more points

Layer 3: Amex Offer loaded: "$50 back on $250+" → $50 cash credit

Total value: ~$59 on a $300 spend = ~20% effective return

Example 2: Electronics Purchase at Best Buy

Purchase: $500 laptop

Layer 1: Citi Premier 3x on electronics → 1,500 points (~$15 value)

Layer 2: Click through Rakuten (Best Buy often at 3–8%) → ~$25 cash back

Layer 3: Chase Offer: "5% back at Best Buy, up to $25" → $25 credit

Layer 4: $20 promotional code found on RetailMeNot

Total value: ~$85 on a $500 spend = ~17% effective return

Example 3: Amazon Purchase

Purchase: $150 Amazon order

Layer 1: Amazon Prime Visa 5% → 750 points ($7.50)

Layer 2: Rakuten often has 1–3% at Amazon (varies) → $3–4.50

Layer 3: Add Chase Offer if available for Amazon → varies

Note: Amazon doesn't allow shopping portal stacking in most cases — Amazon Prime Visa 5% is usually the best available. This is an exception where the card is dominant.

Tracking Your Offers

The volume of available offers across multiple cards is too high to monitor manually. Tools that help:

CardPointers (iOS app) — aggregates Chase Offers and Amex Offers across all your cards in one view. The paid version ($4.99/month) is genuinely useful if you have 4+ cards.
Award Wallet — tracks portal bonuses and offer expirations
Cashback Monitor (cashbackmonitor.com) — compares portal rates across Rakuten, TopCashback, BeFrugal simultaneously

Common Mistakes

Forgetting to activate before purchase. Both Chase Offers and Amex Offers require activation (clicking "Add to Card") before you buy. The credit won't apply retroactively.

Going directly to the retailer. The single most costly habit. If you have a bookmark for Amazon, Nordstrom, or Marriott, replace it with the portal URL.

Using the wrong card for the category. Paying for dinner with a 1x card when you have an Amex Gold (4x dining) in your wallet is a guaranteed loss.

Ignoring statement credits. Many premium cards have annual credits ($300 travel credit, $240 digital entertainment credit, etc.) that effectively reduce the annual fee. These should be modeled into your card selection math.

Building a Stack-Optimized Setup

The sweet spot for most people is two to three cards:

A premium travel card for travel, dining, and large purchases (Chase Sapphire Reserve or Amex Platinum)
A category multiplier for groceries/gas (Amex Gold or Citi Premier)
A catch-all 2% card for everything else (Citi Double Cash)

With this setup and consistent portal use + offer activation, a household spending $5,000/month can realistically capture $1,000–$1,500/year in value — well above the combined annual fees of these cards.

Planning Trips Around Your Points

Once you start stacking, the natural question is: how do I actually use these points? The highest value comes from transferring to airline and hotel partners — Hyatt, United, British Airways, and Air France/KLM are reliably strong options for both Chase and Amex.

Faroway helps you plan trips that maximize the points and credits you've accumulated. Plug in your reward balances and it builds a personalized itinerary that matches your available points to destinations — so you're not just collecting rewards, you're using them.

Because points you never redeem are worth exactly zero.

→ Plan a trip with your rewards on Faroway

How to Stack Credit Card Offers with Portal Bonuses for Maximum Value