Luotin siihen, että hän auttaa minua.

English Translation

I was banking on him to help me.

‘Banking’??? ‘Louttaa’ here means ‘to rely on’ or ‘to count on’.

https://en.wiktionary.org/wiki/luottaa#Finnish

That is indeed what “bank on” means.

2 Likes

Fair point. Meriam-Webster also supports you.

https://www.merriam-webster.com/dictionary/bank%20on

I will put my prejudice down to not remembering that expression from the time I lived in the UK.