spare no expense

spare no expense (third-person singular simple present spares no expense, present participle sparing no expense, simple past and past participle spared no expense)

1. To be willing to pay as much as necessary to achieve an objective.
   • 1958 May, “Railway Difficulties in the U.S.A.”, in Railway Magazine, page 296:

     The railways are fully alive to the position, and are sparing neither effort nor expense to provide more attractive trains and to effect economies, but in such circumstances some curtailment of services is inevitable.

• spare no effort

• “spare no expense”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “spare no expense”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “spare no expense” (US) / “spare no expense” (UK) in Macmillan English Dictionary.
• “no expense is spared”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.
• “spare no expense”, in Collins English Dictionary.