Let's see if my maths is correct......
Option #1: Amex via RewardPay
$1000 + 2.64% -> RewardPay -> ATO costs $1026.40:
Result:
Amex Platinum Edge 1:1; 1026 points = 1026 KMiles at cost of $0.26c per point (26.40/1026)
Amex Explorer Card 2:1; 2052 points = 2052 Kmiles at cost of $0.13 per point (26.40/2052)
Option #2: Dragon
$1000 + 0.78% -> ATO costs $1007.80;
Result: 1007 dragon points -> 503 KMiles: $0.16 per point (7.80/503)
I'm not great at maths, but I get a different figure for Option 2.
For ATO payments assuming we are talking about the Amp Sig Visa, the effective earn is 0.825 KF miles per $ (with the 10% bonus)
So 1007 dragon points is 830 KF miles. (For $7.80 CC surcharge)
That means a cost of 0.94c per KF mile (780/830)
Next bit might be dodgy, but it's the way my brain works:
On the top tax bracket of 47%, if surcharge is a tax deduction, effective cost is 53% of 0.94c, which comes to approx 0.5c per KF mile.
So if surcharge is a tax deduction, a 300,000 KF miles redemption (business to Europe return) will cost about $1,500 in ATO surcharges plus roughly $1k in fees/ charges
Is there a MC ATO option? (surcharge only 0.4%)