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The HDFC Millennia caps cashback at ₹1,000 a month. The SBI Cashback caps at ₹2,000 a month on online spends — a doubling, not a five-fold gap, after the April 1, 2026 devaluation that halved SBI's online sub-cap. The headline 5% rate is identical on both. The fees are within ₹1 of each other. The eligibility floor is the same ₹3,00,000 income. After the cap restructure, the gap that used to decide every comparison has narrowed to the point where the lounge access on the Millennia tips most profiles back toward it.
The decisive answer for most readers after April 2026: pick the HDFC Millennia. The SBI Cashback wins narrowly only for one specific profile — heavy online spenders pushing ₹40,000+ a month concentrated on non-Millennia partners like Tata CLiQ, BookMyShow, or MakeMyTrip.
The numbers, side by side
| Metric | HDFC Millennia | SBI Cashback |
|---|---|---|
| Joining fee | ₹1,000 | ₹999 |
| Annual fee | ₹1,000 | ₹999 |
| Annual fee waiver | ₹1,00,000 spend | ₹2,00,000 spend |
| Headline 5% on | Amazon, Flipkart, Myntra, Sony LIV | All online (with exclusions) |
| Other online rate | 2.5% | 1% (offline) |
| Default rate | 1% (tap-and-pay) | 1% (offline) |
| Monthly cashback cap | ₹1,000 | ₹2,000 online + ₹2,000 offline (₹4,000 aggregate) |
| Domestic lounges | 8 per year | 0 |
| Min income | ₹3,00,000 | ₹3,00,000 |
Identical 5% rate, narrower-than-it-used-to-be ceiling gap. That is the real comparison after April 2026.
Why the cap still dominates — just less than before
A monthly cashback cap is the maximum cashback the bank will pay regardless of how much you spend. The HDFC Millennia caps at ₹1,000 a month. The SBI Cashback caps at ₹2,000 a month on online (separate ₹2,000 offline sub-cap, aggregate ₹4,000) after April 1, 2026.
To max out the HDFC Millennia at 5%, you spend ₹20,000 a month on Amazon, Flipkart, Myntra, or Sony LIV combined. Anything above that earns 2.5% on broader online or 1% on tap-and-pay. To max out the SBI Cashback's online side, you spend ₹40,000 a month on eligible online categories. The gap is meaningful but not dramatic.
The offline sub-cap is effectively dormant for retail users — it takes ₹2,00,000 a month of offline spend to bind, which no normal cardholder reaches.
For a household concentrated on Amazon and Flipkart, the Millennia hits its cap at ₹20,000/mo and pays out a smooth 2.5% on overflow. For the same household, SBI hits its cap at ₹40,000/mo and pays nothing on overflow. SBI's higher ceiling looks better, but the overflow cliff is harsher.
Category strengths
Where the HDFC Millennia pulls ahead
Tighter category list, better merchant guarantee. Because HDFC names four specific merchants (Amazon, Flipkart, Myntra, Sony LIV), there is less classification ambiguity. If you bought it on Amazon, you earned 5%. SBI's broader "all online" definition has more grey area, where merchant gateway routing can drop a transaction from 5% to 1%.
Lounge access. 8 domestic lounge visits a year is a real benefit if you fly even occasionally. The SBI Cashback offers no lounge access. At ₹500 a visit walk-in cost at most lounges, this benefit is worth roughly ₹2,000 to ₹4,000 a year if you use it.
Lower spend gate for the fee waiver. ₹1,00,000 in a year is achievable for almost any active cardholder. SBI's ₹2,00,000 gate is double that.
2.5% on other online. The HDFC Millennia pays 2.5% on online spends outside the four flagged merchants. The SBI Cashback drops to 1% offline and excludes a long list of online categories outright. For someone whose online spending is spread across many merchants, the Millennia's tiered rate often pays more than SBI's 5%-or-1% split.
Where the SBI Cashback pulls ahead
Higher absolute cap. ₹2,000 a month on online is still twice the Millennia's ₹1,000 cap. For someone whose online spend is concentrated on non-Millennia merchants (Tata CLiQ, BookMyShow, MakeMyTrip, Reliance Digital), this is the SBI card's only structural advantage.
Broader 5% definition where it applies. When SBI's 5% applies, it covers a wider list of online merchants than HDFC's four named brands. The asterisk is large: the exclusion list now covers wallet loads, rent, utilities, insurance, jewellery, school fees, gaming, tolls, and government transactions.
Slightly lower joining fee. ₹999 vs ₹1,000. Difference is symbolic.
Three households, three answers (post-April-2026 math)
We ran three scenarios using publicly known fee and cap structures under the new April 1, 2026 SBI rules.
Scenario 1: ₹15,000 a month online, mostly Amazon and Flipkart. The Millennia earns 5% capped at ₹1,000, so ₹750/mo or ₹9,000/yr. The SBI Cashback earns 5% well under its ₹2,000 cap, so also ₹750/mo or ₹9,000/yr. Tie on cashback. Millennia wins on 8 lounges (worth ₹2,000–₹4,000/yr).
Scenario 2: ₹40,000 a month online, mixed merchants. The Millennia caps at ₹1,000 on named brands plus 2.5% on the rest. Assuming half is Amazon/Flipkart and half is broader online: ₹1,000 (capped) + ₹500 (2.5% on ₹20k) = ₹1,500/mo or ₹18,000/yr. The SBI Cashback caps at ₹2,000/mo or ₹24,000/yr. SBI wins by ₹6,000/yr, narrowed by Millennia's lounge value to a net SBI margin of ₹2,000–₹4,000/yr. (Before April 1, SBI's margin in this scenario was ₹12,000/yr.)
Scenario 3: ₹20,000 a month online concentrated on non-Millennia partners (Tata CLiQ, BookMyShow, MakeMyTrip). The Millennia pays only 2.5% on these: ₹500/mo or ₹6,000/yr. The SBI Cashback pays 5% well under the cap: ₹1,000/mo or ₹12,000/yr. SBI wins by ₹6,000/yr. This is the new sweet spot for the SBI card.
Is It Worth It
For most professional households, the HDFC Millennia is now the better daily driver. The April 2026 devaluation halved SBI's effective ceiling on online cashback, and the 8 lounge visits on the Millennia are worth roughly the residual cashback margin SBI retains.
Pick the HDFC Millennia if your online spend is below ₹40,000 a month, if you fly even a few times a year, if your spend is spread across named partners (Amazon, Flipkart, Myntra, Sony LIV), or if you value the predictable 2.5% safety net on broader online over SBI's harder overflow cliff.
Pick the SBI Cashback only if your monthly online spend exceeds ₹40,000 AND a meaningful share of it sits on non-Millennia partners (Tata CLiQ, BookMyShow, MakeMyTrip, Reliance Digital). That is the narrow segment where the ₹2,000 online sub-cap pays out in full and the merchant overlap with HDFC is thin enough that the Millennia's 2.5% safety net does not catch up.
The honest answer for the median reader: the Millennia is now the default. SBI Cashback is a specialist tool for a smaller segment than it was six weeks ago.
Sources
Card devaluations, reward maths, and rate changes the day they land.
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