The phrase "sufficient reserves" means having enough of something to meet a particular need or requirement. It implies that there is an adequate amount available to use when necessary. Full definition
These budgets allow the residents to understand where their association dues are being spent and whether or not sufficient reserve funds are being held for large projects to maintain the community. (rismedia.com)
The springs themselves offer sufficient reserves of comfort with their unique characteristics. (topspeed.com)
If an insurance company has taken on additional risk, or a seen an increase in claims from a prior year, they may raise their rates to ensure sufficient reserves. (effectivecoverage.com)