A forumer over at EA's FIFA09 UT forum by the handle KronikxJ has written an excellent guide to the Coins you can earn for a game.
Click here to read the original threadThere's also a coins calculator on excel spreadsheet over there for your download and use.
All credits to KronikxJ for the hard work.
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POSITIVE EARNINGS
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Match Completion: 200 Coins
Goals: 200 Coins (40 coins per goal - 5 goals MAX)
Shots On Target: 75 Coins (5 coins per SOT - 15 SOT MAX)
Tackles: 20 Coins (1 coins per tackle - 20 tackles MAX)
Corners: 50 Coins (5 coins per corner - 10 corners MAX)
Clean Sheet: 25 Coins
Passes Complete %: 100 Coins MAX (Your percentage = coins earned)
Possession %: 100 Coins MAX (Your percentage = coins earned)
Man Of The Match: 10 Coins
Notes:
After 5 goals no more coin bonuses will be awarded
After 15 shots on target no more coin bonuses will be awarded
After 20 tackles no more coin bonuses will be awarded
After 20 corners no more coin bonuses will be awarded
ONLINE GAMES ARE DIFFERENT , CORNERS ARE WORTH 5 COINS
AND THE MULTIPLIER IS A FIXED x1.5
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TOTAL POSSIBLE EARNINGS: 780 COINS
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NEGATIVE EARNINGS
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Goals Against: -100 coins MAX (-20 per goal, 5 goals MAX)
Fouls: -10 coins per foul (MAX unknown)
Yellow Cards: -5 coins per yellow (MAX -75 coins, 15 yellow MAX)
Red Cards: -10 coins per red (MAX -40 coins , 4 red cards MAX)
Offsides: -1 coins per offside (MAX unknown)
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TOTAL POSSIBLE NEGATIVE EARNINGS: ???
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MULTIPLIERS
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DIFFICULTY MULTIPLIER:
Amateur: x 0.45
Semi-Pro: x 0.90
Professional: x 1.35
World Class: x 1.80
Legendary: x 2.25
ONLINE MODE IS A FIXED MULTIPLIER OF x1.5
HOME / AWAY MULTIPLIER:
Home: x 1.00
Away: x 1.02
TEAM DIFFERENCE MULTIPLIER:
½ star vs ½ star = x 1.00
½ star vs 1 star = x 1.04
½ star vs 1 ½ star = x 1.08
½ star vs 2 star = x 1.12
½ star vs 2 ½ star = x 1.16
½ star vs 3 star = x 1.20
½ star vs 3 ½ star = x 1.24
½ star vs 4 star = x 1.28
½ star vs 4 ½ star = x 1.32
½ star vs 5 star = x 1.36
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1 star vs ½ star = x 0.96
1 star vs 1 star = x 1.00
1 star vs 1 ½ star = x 1.04
1 star vs 2 star = x 1.08
1 star vs 2 ½ star = x 1.12
1 star vs 3 star = x 1.16
1 star vs 3 ½ star = x 1.20
1 star vs 4 star = x 1.24
1 star vs 4 ½ star = x 1.28
1 star vs 5 star = x 1.32
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1 ½ star vs ½ star = x 0.92
1 ½ star vs 1 star = x 0.96
1 ½ star vs 1 ½ star = x 1.00
1 ½ star vs 2 star = x 1.04
1 ½ star vs 2 ½ star = x 1.08
1 1/2 star vs 3 star = x 1.12
1 ½ star vs 3 ½ star = x 1.16
1 ½ star vs 4 star = x 1.20
1 ½ star vs 4 ½ star = x 1.24
1 ½ star vs 5 star = x 1.28
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2 star vs ½ star = x 0.88
2 star vs 1 star = x 0.92
2 star vs 1 ½ star = x 0.96
2 star vs 2 star = x 1.00
2 star vs 2 ½ star = x 1.04
2 star vs 3 star = x 1.08
2 star vs 3 ½ star = x 1.12
2 star vs 4 star = x 1.16
2 star vs 4 ½ star = x 1.20
2 star vs 5 star = x 1.24
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2 ½ star vs ½ star = x 0.84
2 ½ star vs 1 star = x 0.88
2 ½ star vs 1 ½ star = x 0.92
2 ½ star vs 2 star = x 0.96
2 ½ star vs 2 ½ star = x 1.00
2 ½ star vs 3 star = x 1.04
2 ½ star vs 3 ½ star = x 1.08
2 ½ star vs 4 star = x 1.12
2 ½ star vs 4 ½ star = x 1.16
2 ½ star vs 5 star = x 1.20
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3 star vs ½ star = x 0.80
3 star vs 1 star = x 0.84
3 star vs 1 ½ star = x 0.88
3 star vs 2 star = x 0.92
3 star vs 2 ½ star = x 0.96
3 star vs 3 star = x 1.00
3 star vs 3 ½ star = x 1.04
3 star vs 4 star = x 1.08
3 star vs 4 ½ star = x 1.12
3 star vs 5 star = x 1.16
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3 ½ star vs ½ star = x 0.76
3 ½ star vs 1 star = x 0.80
3 ½ star vs 1 ½ star = x 0.84
3 ½ star vs 2 star = x 0.88
3 ½ star vs 2 ½ star = x 0.92
3 ½ star vs 3 star = x 0.96
3 ½ star vs 3 ½ star = x 1.00
3 ½ star vs 4 star = x 1.04
3 ½ star vs 4 ½ star = x 1.08
3 ½ star vs 5 star = x 1.12
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4 star vs ½ star = x 0.72
4 star vs 1 star = x 0.76
4 star vs 1 ½ star = x 0.80
4 star vs 2 star = x 0.84
4 star vs 2 ½ star = x 0.88
4 star vs 3 star = x 0.92
4 star vs 3 ½ star = x 0.96
4 star vs 4 star = x 1.00
4 star vs 4 ½ star = x 1.04
4 star vs 5 star = x 1.08
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4 ½ star vs ½ star = x 0.68
4 ½ star vs 1 star = x 0.72
4 ½ star vs 1 ½ star = x 0.76
4 ½ star vs 2 star = x 0.80
4 ½ star vs 2 ½ star = x 0.84
4 ½ star vs 3 star = x 0.88
4 ½ star vs 3 ½ star = x 0.92
4 ½ star vs 4 star = x 0.96
4 ½ star vs 4 ½ star = x 1.00
4 ½ star vs 5 star = x 1.04
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5 star vs ½ star = x 0.64
5 star vs 1 star = x 0.68
5 star vs 1 ½ star = x 0.72
5 star vs 2 star = x 0.76
5 star vs 2 ½ star = x 0.80
5 star vs 3 star = x 0.84
5 star vs 3 ½ star = x 0.88
5 star vs 4 star = x 0.92
5 star vs 4 ½ star = x 0.96
5 star vs 5 star = x 1.00
Notes: Team Difference multiplier does not apply in online matches.
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COLLECTION EARNINGS
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Adding a Gold player card to your collection will fetch around 475-500 coins.
Adding a silver card to your collection will fetch around 150-200 coins.
Completing a 7 page team in your collection will fetch you a 1,000 coin bonus.
Completing a 14 page team in your collection will fetch you a 5,000 coin bonus.
The maximum coins available to earn in a single game are: 2010 (Multiplier x3.1212)
Note: When working out your total earnings remember not to include the 200 coins completion bonus in the amount that gets multiplied (you add the 200 coins at the end once you've worked out the coins that get multiplied).
However to get that amount you'd need to achieve unlikely/impossible statistics, such as 100% possession, 100% pass completion and no fouls/offsides. Not to mention the fact you'd need to play as a ½ star team against a 5 star team on Legendary difficulty.