Originally Posted by
horseguy
Hi njarecki,
You might want to reconsider paying your taxes to get miles.
Officialpayments charges a convenience fee of 2.35% (2.1% if you have a payment over 100K and use an Amex card). If you use an Amex SPG to earn Starwood points, you will get a 25% bonus when you convert. That works out to 2.35 cents/1.25 miles or 1.88 cents per mile. I personally was lucky enough to convert during the AA 35% conversion bonus promotion so it worked out for me to be 1.4 cents per mile.
You can also use payusatax.com for a 1.95 percent fee, but no Amex.
And if you like *A miles, I think you can still get in on the 50 percent U.S. Air bonus, so a $100,000 tax payment on starwood amex would cost $2,100 and you would get 180k miles.