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CardMath.in2026 MITCSmart Reward Math
Verified 2026 Bank MITC Rules & RBI ExclusionsUpdated: 2026-03-01

BPCL SBI Card OCTANE vs HDFC Diners Club Black Metal Edition for ₹50,000 Monthly Spend

Comparing BPCL SBI Card OCTANE vs HDFC Diners Club Black Metal Edition at ₹50,000/month. HDFC Diners Club Black Metal Edition wins, delivering ₹24,292 net annual value (4.05% ROI) vs ₹7,680 for BPCL SBI Card OCTANE.

Interactive Head-to-Head Simulator

Test Your Monthly Spend & Category Mix

Simulates real-world capping thresholds, 18% GST deductions, and bank waiver rules in real time.

₹50,000(₹6,00,000/yr)
₹10,000/mo₹1,00,000/mo₹2,50,000/mo
Winner at ₹50,000/mo+ ₹16,612/yr Higher Value

HDFC Diners Club Black Metal Edition

Delivers ₹24,292 net annual returns (4.05% ROI) vs ₹7,680 on BPCL SBI Card OCTANE.

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Card A

BPCL SBI Card OCTANE

SBI Card

₹7,680Net Annual Benefit
Gross Rewards:₹7,680/yr
Effective Fee (incl. GST):Waived (₹0)
Net ROI on Spend:1.28%
Fee Waiver Progress (2L target):100%
Card B

HDFC Diners Club Black Metal Edition

HDFC Bank

₹24,292Net Annual Benefit
Gross Rewards:₹36,092/yr
Effective Fee (incl. GST):₹11,800
Net ROI on Spend:4.05%
Fee Waiver Progress (8L target):75%
2-Card Optimization HackMaximize Trapped / Capped Spend
+₹6,000/year Extra Yield

Pair HDFC Diners Club Black Metal Edition + Airtel Axis Bank Credit Card

Pair HDFC Diners Club Black Metal Edition with Airtel Axis Bank Credit Card to capture up to ₹6,000/yr extra on zero-reward categories.

Routes excluded categories:Utility & Offline Spends
Add Airtel →

Detailed 12-Category Rupee Breakdown (@ ₹50,000/mo)

Spend CategoryMonthly SpendBPCL SBI Card OCTANEHDFC Diners Club Black Metal Edition
Amazon, Flipkart & Myntra Shopping₹12,500/mo₹31 (0.25%)₹1,249 (9.99%)
Scan & Pay Merchant UPI₹7,500/mo₹19 (0.25%)₹250 (3.33%)
Electricity, Water, Gas & Broadband Bills₹6,000/mo₹15 (0.25%)₹200 (3.33%)
Swiggy, Zomato & Dining Out₹6,000/mo₹150 (2.5%)₹400 (6.66%)
Blinkit, Zepto, Instamart & Supermarkets₹5,000/mo₹125 (2.5%)₹167 (3.33%)
Petrol & Diesel at Fuel Stations6.25% + 1% surcharge waiver valid at BPCL petrol pumps up to ₹4,000/txn, max 2500 points/mo₹4,000/mo₹290 (7.25%)0% Excluded
Flights, Hotels & IRCTC Trains₹4,000/mo₹10 (0.25%)₹660 (16.5%)
LIC, Health & Term Insurance Premiums₹2,500/mo0% Excluded₹83 (3.33%)
House Rent & School/College Fees₹199 + GST processing fee on rent transactions₹2,500/mo0% Excluded0% Excluded
International Travel & Forex Spends₹0/mo₹0 (0.25%)₹0 (3.33%)
Gold, Silver & Jewelry Purchases₹0/mo₹0 (0%)₹0 (0%)
Income Tax, GST & Challan Payments₹0/mo₹0 (0%)₹0 (0%)
Net Annual Benefit₹6,00,000/yr+₹7,680+₹24,292

Frequently Asked Questions

Which card is better between BPCL SBI Card OCTANE and HDFC Diners Club Black Metal Edition for ₹50,000/month?▼
At ₹50,000/month (₹600,000/year), HDFC Diners Club Black Metal Edition mathematically outperforms BPCL SBI Card OCTANE by ₹16,612/year. HDFC Diners Club Black Metal Edition delivers ₹24,292 net annual benefit (4.05% effective yield), while BPCL SBI Card OCTANE returns ₹7,680 (1.28% effective yield).
Will the annual fee be waived at ₹50,000 monthly spend?▼
On an annual spend of ₹600,000: BPCL SBI Card OCTANE annual fee is waived (₹0). HDFC Diners Club Black Metal Edition annual fee is payable at ₹11,800 (incl. 18% GST).
How do reward caps impact the earnings on both cards?▼
At this spend tier, BPCL SBI Card OCTANE loses ₹0/year to monthly cashback caps, while HDFC Diners Club Black Metal Edition loses ₹0/year. BPCL SBI Card OCTANE remains uncapped at this spend. HDFC Diners Club Black Metal Edition remains uncapped at this spend.
What is the breakeven monthly spend between BPCL SBI Card OCTANE and HDFC Diners Club Black Metal Edition?▼
The calculated crossover breakeven spend is ₹21,000/month, where higher-fee benefits overtake the lower-fee option.
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