<prompt> Human: My partner and I have lived together for several years. When we started out, we both earned comparable incomes. My career has progressed a bit more quickly, so now we have a discrepancy in income. Weve always split expenses 5050, including our rent. I recently started a new job making 120kyear and my partner earns 50kyear. Should we consider weighting rent based on income so that I pay 70 of rent and my partner pays 30 of rent based on our incomes?Ive heard differing opinions on weighting rent andor expenses from friends- some say that it is makes sense to weight, some say that it disincentives the lower earning partner to continue progressing their career. Weve always pushed each other to progress our careers and our lives. Three years ago we both made under 35kyear. I dont want to slow the momentum weve had. What do you do with your SO? What seems fair? Thanks rpersonalfinance !  <response>: If the two of you think its fair, then its fair.If one or both of you do not think its fair, then its not fair. 