The base value of the contract Kevin Kolb signed with the Buffalo Bills is $6.1 million over two seasons.

Kolb’s deal could be worth up to $13 million in total money, but he will have to hit a lot of incentives to reach that amount.

For practical purposes, Kolb’s deal is worth $3 million this year and $3 million next year, according to figures obtained by The News. He gets a $1 million signing bonus and a base salary worth $1.65 million this season. He has a $250,000 roster bonus if he is on the 46-man roster for the season opener. He also has $100,000 in workout bonuses in this year’s total.

In 2014, the contract calls for a $1 million roster bonus, a base salary of $2 million and a $100,000 workout bonus.

In short, the Bills signed Kolb for less than they would have paid to keep Ryan Fitzpatrick. The Bills also were offering Fitzpatrick a $3 million per year deal, plus significant incentives. But they were offering Fitzpatrick a four-year contract. Fitzpatrick wound up signing a two-year, $6.5 million deal with Tennessee.

The incentives in Kolb’s deal mostly are tied to playing time and production. If he hits certain play-time percentages he can earn an extra $2 million each year.

The contract of Bills QB Tarvaris Jackson is worth $2.25 million this season. That includes a $500,000 signing bonus and a base salary of $1.75 million.