Pay for itself
Definition 1 of 1
Pro Tip 1/3Investment Context
Often used in financial or business situations to suggest a smart purchase or project that saves costs. 
Investing in this software will pay for itself by boosting our team's productivity.
Pro Tip 2/3Time Frame
Implies recovery of costs over a period, which can be short or long-term. 
The solar panels might be pricey, but they'll pay for themselves in 5 years.
Pro Tip 3/3Cost-Benefit
Reflects cost-saving benefits; the initial expense leads to future savings. 
Though the electric car is costly, it will soon pay for itself in gas savings.