# oncost

> English word · Noun

## Definitions
1. Additional costs; extra expenses.
2. Overhead (expense)
3. The cost of upkeep, making and maintaining shafts, roads, pumping, etc.
4. The indirect expenditure incurred for the purpose of increasing the productive power of organised labour.

## Etymology
From on- + cost, or from Middle English uncost (“additional expense”), from Middle Dutch oncost (“expenses, overhead”) (Modern Dutch onkost), equivalent to un- + cost. Cognate with German Unkost (“expenses”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/oncost