1 Corinthians 9:18

16 Yet when I preach the gospel, I have no reason to boast, because I am obligated to preach. Woe to me if I do not preach the gospel!

17 If my preaching is voluntary, I have a reward. But if it is not voluntary, I am still entrusted with a responsibility.

What then is my reward? That in preaching the gospel I may offer it free of charge, and so not use up my rights in preaching it.

19 Though I am free of obligation to anyone, I make myself a slave to everyone, to win as many as possible.

20 To the Jews I became like a Jew, to win the Jews. To those under the law I became like one under the law (though I myself am not under the law), to win those under the law.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
What then is my reward? That in preaching the gospel I may offer it free of charge, and so not use up my rights in preaching it.
KJV
What is my reward then? Verily that, when I preach the gospel, I may make the gospel of Christ without charge, that I abuse not my power in the gospel.
WEB
What then is my reward? That when I preach the Good News, I may present the Good News of Christ without charge, so as not to abuse my authority in the Good News.
ASV
What then is my reward? That, when I preach the gospel, I may make the gospel without charge, so as not to use to the full my right in the gospel.
DARBY
What is the reward then that I have? That in announcing the glad tidings I make the glad tidings costless [to others], so as not to have made use, as belonging to me, of my right in [announcing] the glad tidings.
BLB
What then is my reward? That preaching the gospel, I should lay down the gospel free of charge, so as not to use up my authority in the gospel.
ÅB
Hva er da min lønn? At jeg, når jeg forkynner evangeliet, gjør det for intet, så jeg ikke gjør bruk av min rett i evangeliet.
OTB
Hva er da min lønn? At når jeg forkynner evangeliet, kan jeg tilby det uten kostnad, for ikke å gjøre full bruk av min rett i evangeliet.
B1930
Hvad er da min lønn? At jeg, når jeg forkynner evangeliet, gjør det for intet, så jeg ikke gjør bruk av min rett i evangeliet.

Study notes (Tyndale)

Original text and word study

Cross references