What comes first before any reconciliation?

Been with my SO for almost 7 years and the one thing that has really come up too many times that caused either a rift or sometimes a brief breakup has been the financial lies and in particular, saying something that doesn't really reflect how bad it is or not saying anything at all when the information is very relevant.

I know my SO loves me very much and is good for me in some respects but the last fight was it for me....I feel like we are really stuck in a cycle despite my SO's promises to change.

I haven't been perfect myself in that b/c of the lies, I fight back b/c I don't know how else to deal with it.

The bottom line is that I believe my SO despite the good heart and loving me, has an issue with the outside appearance of things and this is just another example.

So....here we go again. My SO asks how will the SO show me that there has been change in transparency unless we are together again? I say I don't want to get back together unless and until I see change. Who's right and who is wrong?

I should add what should I expect in terms of his taking responsibility for his actions? Because when I tell him I need to see that too he always says we are both responsible.

I've been hurt so many times by the lies I don't know if to give another chance or if I do, how I go about it.

if anyone has any thoughts I'd appreciate you sharing.