Citi Cash Back card review: 8% on petrol, and how it sits with the pump discount

The Citi Cash Back card pays 8% on petrol and rides and 6% on dining and groceries. The catch: those rates only apply in statement months with $800 of spending, the total stops at $80 a month, and pump discounts and cash back multiply rather than add.

Here's what it pays, the $800 that switches the bonus on, the $80 cap, how pump discounts and cash back fit together, and a worked year you can redo with your own numbers.

The Citi Cash Back card at a glance

Figures from the Citi Cash Back Card Program Information in the Cardmember's Agreement (in effect from 1 May 2025), the Citi product page and Citi's petrol savings page, checked 1 Nov 2026.

How much cash back does it pay?

Clause 3 of the Program Information sets out a base rate and four bonus rates: - 0.2% on retail purchases, always (clause 3(a)). - With $800 of retail spending in the statement month, an extra 5.8% on dining and groceries and an extra 7.8% on petrol, all worldwide, and an extra 7.8% on private commute (clause 3(b)). Together with the base, that's 6% and 8%.

The bonus goes by merchant category code, the four-digit code the shop's bank gives it (MCC). Citi's product page lists them: petrol 5541 and 5542, private commute 4121 (taxis and private hire, such as Grab, Gojek, Ryde, TADA and the taxi companies), dining 5811, 5812 and 5814, and groceries 5411.

A $60 dinner in a qualifying month is $60 × 6% = $3.60. A $25 Grab ride is $25 × 8% = $2.

Bottom line: a bakery or a minimart may not be coded as dining or groceries. The code decides, and it's set by the shop's bank, not by Citi (clause 3(b)).

The $800 that switches the bonus on

The minimum is counted on your statement month, the period between two statement dates. It's "total retail spend", so purchases that don't earn cash back (insurance, bills, tax and the rest of the list further down) don't count towards it either.

Below $800, nothing in the month gets the bonus. Two months, each with $300 of dining:

That's $20 more spending for $17.44 more cash back.

Bottom line: the minimum is all-or-nothing. If your spending sits near $800, know your statement date and where you stand before the month closes.

The $80 cap, and who shares it

Clause 3(c) caps the cash back at $80 per statement month, "across the basic cardmember and its supplementary cardmembers". The cap covers the base rate as well as the bonus.

You'd reach it with $80 ÷ 8% = $1,000 of petrol or rides alone, or $80 ÷ 6% = about $1,333 of dining and groceries alone. Past the cap, the card earns nothing more that month.

Bottom line: a supplementary card's spending fills the same $80. Count it when you check how close you are.

Petrol: how the station discount and the cash back fit together

Station discounts and card cash back don't add up. The station's discount comes off first, and the card's cash back is worked out on what's left. Citi's petrol savings page lists discounts at three brands for Citi cardholders, and it's clear that the 8% is worked out on the nett purchase, the amount actually charged after the discounts.

Take a $100 fill-up at Shell, where Citi lists a 10% Shell GO+ discount and a 4% Citi card discount: 1. Discounts first: $100 × (100% − 14%) = $86 charged to the card. 2. Cash back on that: $86 × 8% = $6.88. 3. What you end up paying: $86 − $6.88 = $79.12, a saving of $20.88, or 20.88%.

Not 14% + 8% = 22%. The 8% is a percentage of a smaller number. The same sum gives Citi's other headline figures:

Each discount has its own conditions on Citi's page: Shell's needs the physical card at the cashier and a Shell GO+ membership, and Esso's last 4% applies only on Saturdays, on one fuel. The 8% needs the $800 month, like every bonus on this card. And the amount that counts towards the $800 is the $86 charged, not the $100 on the pump.

Bottom line: when a poster adds two percentages together, multiply instead: (1 − discount) × (1 − cash back). It's a 20-second sum.

Why the cash back arrives in $10 steps

Clause 3(g) is the unusual one. Cash back is credited automatically on the statement date, but only once you have at least $50, and only in multiples of $10. The rest carries over.

Say a month earns $57.40. On the statement, $50 is credited and $7.40 carries over. The next month earns $41.10. With the $7.40, that's $48.50, under $50, so nothing is credited and it all carries over again.

Cash back is worked out per purchase to the nearest cent (clause 3(f)), so small purchases aren't rounded away. It doesn't expire (clause 3(i)), but it's forfeited if the card account is closed (clause 2(b)).

Bottom line: a quiet month can show no cash back on the statement even though you earned some. It's waiting, not lost, unless you close the card.

What doesn't earn cash back

Clause 3(e) lists what earns nothing and doesn't count towards the $800: bill payments, education, government payments (tax, fines, postal services, parking), insurance, payments to banks and brokerages, non-profits, gambling, top-ups to payment apps and prepaid accounts, transit-related transactions, and the codes and merchants on Citi's exclusion list, which include utilities, property rentals, hospitals, BUS/MRT, EZ-Link and YouTrip.

Bottom line: taxis and private hire earn 8%, but the MRT gantry and the bus earn nothing. Leave those out when you estimate the card's month.

How it compares on petrol

Cashback cards that pay a higher rate on petrol, as at 24 Oct 2026 (OCBC 365 as at 1 Nov 2026, when its new terms began), from each bank's terms, ranked by the petrol rate:

Each bank has its own pump discounts as well, and those differ by brand and by card. The table is the card's own rate only. The Citi Cash Back+ review covers Citi's flat-rate card, which is the other way of doing it.

A worked year

Say Aaron is 42 and drives to work. In a typical month his card shows $350 at petrol stations (after the station's discounts), $300 on dining, $250 on groceries, $50 on rides and $200 on other things: $1,150 in total. Made-up example.

Over a year that's $65.40 × 12 = $784.80, credited in $10 steps as it builds up. Less the $196.20 annual fee (the product page doesn't list a waiver rule), that's $588.60 in the year, plus whatever the station discounts saved him at the pump.

If one month he went on leave and spent $700 instead, that month would earn $700 × 0.2% = $1.40.

Bottom line: swap in your own categories and check how many of your months clear $800. The calculator page does the same sums for a few typical months: Citi Cash Back on the card rewards calculator.

Three things to remember

1. 8% petrol and rides, 6% dining and groceries, only in statement months with $800 of spending. Under $800, everything is 0.2%.
2. $80 a month in total, shared with supplementary cards. About $1,000 of petrol fills it.
3. Pump discounts and cash back multiply, they don't add. The 8% is on the amount after the discount.

Ethan's rating

6.0out of 10

Earn rate

• Very low
• Low
• Moderate
• High
• Very high

Effort to earn

• Effortless
• Easy
• Some effort
• Shiong
• Very shiong

Value for the fee

• Way overpriced
• Overpriced
• Fair
• Good value
• Great value

Against other cashback cards

$800 minimum spend a monthCashback cards: the lower the monthly minimum, the higher the rating.

• Bottom
• Below average
• Average
• Above average
• Top

Where it earns

• DiningBonus rate
• GroceriesBonus rate
• TransportGood
• OnlineNothing much
• TravelNothing much
• OverseasFair
• Everything elseNothing much

One person's opinion, from the terms in this review. Your own spending decides what a card is worth to you.

Track it in Sum

Import your card statements. On a card like this, the tracker that matters is the minimum: it shows how far you are from $800 in the current statement month, and how much of the $80 cap is used. The card optimiser works out each purchase by the bank's categories, though the pump discounts themselves aren't something Sum models.

Ethan

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