How couples split money fairly
There's no single right way for couples to share costs, but there are three common approaches. Splitting 50/50 is simple and works well when incomes are similar. Proportional splitting divides shared costs by income, so if one partner earns 60% of the household income they pay 60% of shared bills. A hybrid keeps a few big bills proportional and splits everything else equally.
Whichever you choose, the key is that it's explicit and written down. A shared ledger removes the background mental arithmetic of "I paid last time" and makes it easy to adjust the arrangement if circumstances change.
Keep personal spending personal. Not every purchase needs to be shared. Use itemized splits for mixed receipts so the shared groceries are split and the personal items are not.