Before inflation

Your savings rate: 40.0%
Your monthly savings: $2,000
Your monthly spending after inflation: $3,300

To keep up with inflation

Raise needed to keep up with inflation:10.0%
Monthly take-home pay: $5,300
Monthly savings: $2,000
Savings rate after 10.0% raise:37.7%

To maintain your initial savings rate of 40.0%

Raise needed to maintain initial savings rate:16.7%
Monthly take-home pay: $5,500
Monthly savings: $2,200