Pay is the same regardless of service. Just do a search on mililtary pay scales I am sure it will come up if you google it.

FWIW... O-1 ( 2nd LT ) less than 2 years service is 2469 per month. Housing allowance w/o dependent $527.10 per month. BAS for officers $192.74. Flight Pay $125 per month ( goes to $650 at 6 years )

Note: Base pay and flight pay are taxable the others are not. So, in round numbers about 3300 per month in round numbers.