Romo's two-year deal, announced Wednesday, calls for salaries of $3.5 million this season and $5.5 million in 2014.
He can earn an additional $200,000 in performance bonuses this year: $50,000 each for 35, 40, 45 and 50 games finished.
His 2014 salary would escalate based on games finished this year, to $5.6 million for 30, $5.7 million for 32, $5.85 million for 37, $6 million for 42, $6.15 million for 47, $6.3 million for 52 and $6.5 million for 55.
Romo had 27 games finished last year, when he took over late in the season for the World Series champions. Brian Wilson's season was cut short in April by elbow ligament-replacement surgery, and Santiago Casilla initially assumed ninth-inning duties.
Manager Bruce Bochy announced shortly after the season that Romo will be his closer going into 2013. Pitchers and catchers report to spring training Tuesday in Scottsdale, Ariz.