The phrase "a time when costs" is correct and usable in written English.
It can be used when discussing a specific period or situation related to expenses or financial considerations.
Example: "We need to reflect on a time when costs were significantly lower to understand our current budget constraints."
Alternatives: "a period when expenses" or "an era when prices".
The impact on Avis has been lower rental rates at a time when costs have continued to rise.
We have seen wages and incomes flat or declining at a time when costs have gone up.
How in the world can Washington pass a bill that raises health costs at a time when costs are already going through the roof?
This is in accordance with rules set at a time when costs connected to refugees were negligible, but doing it at scale is unwise.
At a time when costs are mounting for charities while returns on investments diminish, this charity finance special looks at how charities are managing rising costs.
"Consider it the concierge program souped up," Mr. Vinh said, adding that it would provide "huge value for our guests" at a time when costs are still a concern for many travelers.
Because Cisco recently won business from China Telecom and Global Crossing, Mr. Stix said, and is expected to get more at a time when cost cuts may improve profit margins, it is now "timely to buy".
At a time when cost-sensitive universities and even national labor experts are examining the role that graduate-student instructors play in higher education, Stanford Graduate School of Education professor Eric Bettinger has released a study that may help decision makers better measure their true value.
At a time when cost-efficiency rules, this capital outlay can no longer be justified.
"These budget cuts come at a time when cost pressures on schools from pensions and national insurance are also increasing.
It will also offer Mars synergy opportunities at a time when cost control becomes increasingly important because of rising ingredient costs.
