What aspect of financial cost from toxicity is harder to quantify than hiring expenses?

Answer

The loss of institutional knowledge.

While hiring costs are easily calculated, the loss of institutional knowledge—such as tacit knowledge regarding client history and internal processes possessed by a departing employee—is harder to quantify but significantly contributes to the overall organizational cost.

What aspect of financial cost from toxicity is harder to quantify than hiring expenses?
culturetoxicenvironmentworkplace