I've been trying to come to grips with the valuation of Qantas FF points and Virgin Velocity points. For example, when I go to a service station which earns 2 points a dollar on my Amex card, but where there is a 2.25% surcharge - do I pay the surcharge or do I pull out another card which earns 0.5 points per dollar, with no surcharge?
...snip...
So, when at the petrol station, if I was getting 2 Qantas points per dollar, that's 2% extra value - so I wouldn't use the Amex card with the 2.25% surcharge. But if I was getting two Velocity points per dollar, for me that's 3.2% extra value, and I could pay the surcharge and still be ahead.
I don't think your maths there works out. 2 points per dollar is almost 200% extra value....
Someone may have answered this already in the discussion, but there are earn rates to consider as much as burn rates. As you allude if you can earn the same number of Velocity and QFF points then clearly you only need to look at what you can get for your points that suit you.
But if you look at say $50 worth of petrol at a service station.
On an Amex card with surcharge of 2.25% = $51.25 for 100 points therefore each point cost you 51.25 cents
On a card that has no surcharge and 0.5 points/$ = $50 for 25 points therefore each point cost you $2
On a card that has no surcharge and 1 point/$ = $50 for 50 points therefore each point cost you $1
So we take that and look at redemption. lets say taxes are equal or close enough. I know its not, but you'd need to make a good spreadsheet to work it out!
The Virgin flight is worth 10,000 points and the same flight is 16,000 points on qantas (this is to offset the difference in value. Again you need to calculate it more accurately but I'm using an example to show you why the surcharge isn't an issue).
So a Virgin 10,000 point flight on a 1point/$ card will cost you $10,000 in credit card transactions.
A Qantas 16,000 point flight on a 2point/$ card with a 2.25% surcharge will cost you $8200 in credit card transactions
See the difference here. This is also why i was less concerned about tax differences. You'd need to pay $1800 in taxes extra on the Qantas flight to make the Virgin flight cheaper. This is looking at getting a comparable service also. For all intents and purposes there is little difference in a Qantas and Virgin domestic economy flight. So what they charge for it and the value of the points don't need to be compared. Its the actual cost of earning those points which really matters.
Comparing the value of the points across airlines isn't a useful tool especially when it may caost you more to get the more highly valued points. You need to look at what you want from you points (This even applies to toasters!) and how much it would cost you to get those points. Maximizing the points value is a different tool although useful when you have a lot of points to spend.
I hope this has all made sense!!