Time is money.
This is usually credited to Benjamin Franklin, but I have become skeptical about attributions after reading this blog. So, I performed my own exploration for this saying and determined that it was indeed Franklin who said it. He reinforced the meaning of the maxim with a common sense example that states: if you skip half-a-days work then you throw away half-a-days wage [AYT]:
Remember that time is money. He that can earn ten shillings a day by his labour, and goes abroad, or sits idle one half of that day, though he spends but sixpence during his diversion or idleness, it ought not to be reckoned the only expence; he hath really spent or thrown away five shillings besides.
He said it in 1748 in an essay titled Advice to a Young Tradesman. Is this an example of a saying that is properly acknowledged?
Quote Investigator: Great work! You have given excellent evidence that Franklin employed the maxim in 1748. The remaining question is: Did someone say it before Franklin?