I don't think they changed the rookie scale much at all since they implemented it. (Unless you're talking about when there was no rookie scale, but that was 20 years ago) But the starting salary for the #1 pick, for instance, is 15% higher than it was even in 2012.
This article from ESPN comparing the 2005 and 2011 CBA's says that the rookie wage scale was pretty much frozen at the prior level, and on the second contract, the maximum is 4 years now instead of 5.
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New contracts
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2005 CBA: Six years with 10.5 percent raises for Bird free agents; five years with 8 percent raises for other players. Maximum salaries are approximately 25, 30 or 35 percent of the salary cap, depending on the player's years of service.
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2011 CBA: Five years with 7.5 percent raises for Bird free agents; four years with 4.5 percent raises for other players (including all sign-and-trade transactions). The maximum salaries are the same as the 2005 CBA, except players coming off their rookie scale contracts qualify for the 30 percent maximum if they meet certain criteria. Minimum and rookie scale salaries are frozen near their 2010-11 levels until revenues rise enough that the reduction is proportional to the 12 percent reduction in the overall system.
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Who benefits? These changes provide the league with more cost control. The exception is the higher maximum salary for fifth-year players who meet certain league honors (MVP, an all-NBA team member twice, or an All-Star twice), which lets young superstars (think Derrick Rose) cash in with a bigger contract sooner.
The higher maximum salary for fifth-year players can also benefit teams. In 2006 LeBron James, Dwyane Wade and Chris Bosh all signed shorter extensions (which allowed them to become free agents in three years) rather than signing on for the maximum five years. The three players timed their free agency to follow their seventh season in the league, when they became eligible for the 30 percent maximum. Allowing franchise players such as these to sign for the higher maximum sooner reduces the temptation for these players to sign shorter contracts, delaying their eventual free agency.
Contract extensions
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2005 CBA: Players coming off their rookie scale contracts can extend for five additional seasons. All other veterans can extend for five total seasons, which includes the seasons remaining on their current contracts.
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2011 CBA: Players coming off their rookie scale contracts can extend for four additional seasons, although the team can designate one player who is eligible for five seasons at the maximum salary. A team can have only one designated player on its roster at any time. All other veterans can extend for four total seasons, which includes the seasons remaining on their current contract. The extension in an extend-and-trade contract is limited to three total seasons, which includes the seasons remaining on the current contract.
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Who benefits? The teams benefit here, just as they do with shorter free-agent contracts -- teams' future salary commitments are reduced. In addition, limiting extend-and-trade contracts to three seasons (including the seasons remaining on the player's current contract) helps reduce situations like the one the Nuggets were in last season with Carmelo Anthony."
And here is the current rookie pay scale. On 2 years are guaranteed for 1st round picks, and if you don't make the lottery, you're not really talking about very much money (certainly, it's not "life changing" money in the sense that you can retire on it). Remember that these guys are in the 35% tax bracket, plus pay agents 10-15%, plus you have a relatively expensive lifestyle to maintain.
Here are the numbers. The table didn't hold its formatting, but the first number is the 1st year salary, then 2nd year salary, 3rd year salary at the option of the club, how much of an increase that is, and how much it takes to make a qualifying offer.
2014-2015 NBA Draft Class
Pick 1st Year Salary 2nd Year Salary 3rd Year Option Salary 4th Year Option: Percentage Increased Qualifying Offer: Percentage Increase
1 $4,592,200 $4,798,900 $5,005,500 26.1% 30.0%
2 $4,108,800 $4,293,700 $4,478,600 26.2% 30.5%
3 $3,689,700 $3,855,800 $4,021,800 26.4% 31.2%
4 $3,326,700 $3,476,400 $3,626,100 26.5% 31.9%
5 $3,012,500 $3,148,100 $3,283,600 26.7% 32.6%
6 $2,736,100 $2,859,200 $2,982,400 26.8% 33.4%
7 $2,497,800 $2,610,200 $2,722,600 27.0% 34.1%
8 $2,288,200 $2,391,200 $2,494,200 27.2% 34.8%
9 $2,103,500 $2,198,100 $2,292,800 27.4% 35.5%
10 $1,998,200 $2,088,100 $2,178,000 27.5% 36.2%
11 $1,898,300 $1,983,700 $2,069,200 32.7% 36.9%
12 $1,803,400 $1,884,600 $1,965,700 37.8% 37.6%
13 $1,713,200 $1,790,300 $1,867,400 42.9% 38.3%
14 $1,627,600 $1,700,900 $1,774,100 48.1% 39.1%
15 $1,546,100 $1,615,700 $1,685,200 53.3% 39.8%
16 $1,468,900 $1,535,000 $1,601,100 53.4% 40.5%
17 $1,395,400 $1,458,200 $1,521,000 53.6% 41.2%
18 $1,325,600 $1,385,300 $1,444,900 53.8% 41.9%
19 $1,266,000 $1,322,900 $1,379,900 54.0% 42.6%
20 $1,215,300 $1,270,000 $1,324,700 54.2% 43.3%
21 $1,166,700 $1,219,200 $1,271,700 59.3% 44.1%
22 $1,120,100 $1,170,500 $1,220,900 64.5% 44.8%
23 $1,075,300 $1,123,700 $1,172,100 69.7% 45.5%
24 $1,032,200 $1,078,700 $1,125,100 74.9% 46.2%
25 $991,000 $1,035,600 $1,080,200 80.1% 46.9%
26 $958,100 $1,001,200 $1,044,300 80.3% 47.6%
27 $930,500 $972,300 $1,014,200 80.4% 48.3%
28 $924,800 $966,400 $1,008,000 80.5% 49.0%
29 $918,000 $959,400 $1,000,700 80.5% 50.0%
30 $911,400 $952,400 $993,400 80.5% 50.0%
First round picks can sign for as much as 120% and as little as 80% of the rookie scale.
2015-2016 NBA Draft Class
Pick 1st Year Salary 2nd Year Salary 3rd Year Option Salary 4th Year Option: Percentage Increased Qualifying Offer: Percentage Increase
1 $4,753,000 $4,966,800 $5,180,700 26.1% 30.0%
2 $4,252,600 $4,444,000 $4,635,300 26.2% 30.5%
3 $3,818,900 $3,990,700 $4,162,600 26.4% 31.2%
4 $3,443,100 $3,598,100 $3,753,000 26.5% 31.9%
5 $3,117,900 $3,258,200 $3,398,600 26.7% 32.6%
6 $2,831,900 $2,959,300 $3,086,800 26.8% 33.4%
7 $2,585,200 $2,701,500 $2,817,900 27.0% 34.1%
8 $2,368,300 $2,474,900 $2,581,500 27.2% 34.8%
9 $2,177,100 $2,275,000 $2,373,000 27.4% 35.5%
10 $2,068,100 $2,161,200 $2,254,200 27.5% 36.2%
11 $1,964,800 $2,053,200 $2,141,600 32.7% 36.9%
12 $1,866,500 $1,950,500 $2,034,500 37.8% 37.6%
13 $1,773,200 $1,853,000 $1,932,800 42.9% 38.3%
14 $1,684,600 $1,760,400 $1,836,200 48.1% 39.1%
15 $1,600,200 $1,672,200 $1,744,200 53.3% 39.8%
16 $1,520,300 $1,588,700 $1,657,100 53.4% 40.5%
17 $1,444,200 $1,509,200 $1,574,200 53.6% 41.2%
18 $1,372,000 $1,433,800 $1,495,500 53.8% 41.9%
19 $1,310,300 $1,369,200 $1,428,200 54.0% 42.6%
20 $1,257,800 $1,314,400 $1,371,000 54.2% 43.3%
21 $1,207,500 $1,261,800 $1,316,200 59.3% 44.1%
22 $1,159,300 $1,211,400 $1,263,600 64.5% 44.8%
23 $1,112,900 $1,163,000 $1,213,100 69.7% 45.5%
24 $1,068,400 $1,116,400 $1,164,500 74.9% 46.2%
25 $1,025,700 $1,071,800 $1,118,000 80.1% 46.9%
26 $991,600 $1,036,300 $1,080,900 80.3% 47.6%
27 $963,000 $1,006,400 $1,049,700 80.4% 48.3%
28 $957,200 $1,000,200 $1,043,300 80.5% 49.0%
29 $950,200 $992,900 $1,035,700 80.5% 50.0%
30 $943,300 $985,700 $1,028,200 80.5% 50.0%
2016-2017 NBA Draft Class
Pick 1st Year Salary 2nd Year Salary 3rd Year Option Salary 4th Year Option: Percentage Increased Qualifying Offer: Percentage Increase
1 $4,919,300 $5,140,700 $5,362,100 26.1% 30.0%
2 $4,401,400 $4,599,500 $4,797,600 26.2% 30.5%
3 $3,952,500 $4,130,400 $4,308,300 26.4% 31.2%
4 $3,563,600 $3,724,000 $3,884,400 26.5% 31.9%
5 $3,227,100 $3,372,300 $3,517,500 26.7% 32.6%
6 $2,931,000 $3,062,900 $3,194,800 26.8% 33.4%
7 $2,675,700 $2,796,100 $2,916,500 27.0% 34.1%
8 $2,451,200 $2,561,500 $2,671,800 27.2% 34.8%
9 $2,253,300 $2,354,700 $2,456,100 27.4% 35.5%
10 $2,140,500 $2,236,800 $2,333,100 27.5% 36.2%
11 $2,033,500 $2,125,000 $2,216,500 32.7% 36.9%
12 $1,931,900 $2,018,800 $2,105,700 37.8% 37.6%
13 $1,835,200 $1,917,800 $2,000,400 42.9% 38.3%
14 $1,743,500 $1,822,000 $1,900,500 48.1% 39.1%
15 $1,656,200 $1,730,700 $1,805,300 53.3% 39.8%
16 $1,573,500 $1,644,300 $1,715,100 53.4% 40.5%
17 $1,494,800 $1,562,000 $1,629,300 53.6% 41.2%
18 $1,420,100 $1,484,000 $1,547,900 53.8% 41.9%
19 $1,356,100 $1,417,200 $1,478,200 54.0% 42.6%
20 $1,301,900 $1,360,400 $1,419,000 54.2% 43.3%
21 $1,249,800 $1,306,000 $1,362,200 59.3% 44.1%
22 $1,199,900 $1,253,800 $1,307,800 64.5% 44.8%
23 $1,151,900 $1,203,700 $1,255,600 69.7% 45.5%
24 $1,105,800 $1,155,500 $1,205,300 74.9% 46.2%
25 $1,061,600 $1,109,300 $1,157,100 80.1% 46.9%
26 $1,026,300 $1,072,500 $1,118,700 80.3% 47.6%
27 $996,700 $1,041,600 $1,086,400 80.4% 48.3%
28 $990,700 $1,035,200 $1,079,800 80.5% 49.0%
29 $983,400 $1,027,700 $1,071,900 80.5% 50.0%
30 $976,300 $1,020,200 $1,064,200 80.5% 50.0%