noun
private expense; personal funds; one's own expense
Refers to money paid from a private individual's own resources rather than from public funds, an organization, or an employer. Often used as 私費で, meaning “at one's own expense.”
彼女は私費で海外の大学に留学した。
She studied at a university overseas at her own expense.
その資料は研究者が私費で購入した
Those materials were purchased by the researcher with personal funds.