Start with a shared definition
Choose a few categories that both people expect to share, such as rent, groceries and utilities. Keep individual spending separate. If an expense serves both people, record the person who paid and the agreed split. Discuss unusual purchases before they become surprises.
Give each account an owner
An account name alone can be ambiguous in a busy household. Assign its owner and check the selected account before saving a record. This keeps a shared view useful without pretending every account is jointly owned. In Money Sweetie, payment methods and records can be organized by household member.
Make the split visible
For a shared bill, decide whether to split it evenly or use a different percentage. Write the decision down with the record. If one person paid the full amount, an IOU or settlement note can make the balance clear. A split is an agreement between people, not a judgment about how much anyone should contribute.
Review once a week
Look for missing entries, duplicates, unclear categories and bills that changed. A short review beats trying to reconstruct a month from memory. If an emailed receipt suggests a record, check it before accepting it. That review catches wrong amounts, dates or accounts.
Plan the next month together
Use the patterns in your records to set realistic targets, then revisit them when life changes. Keep the conversation about decisions you can make next, rather than assigning blame for old entries. Money Sweetie is a recordkeeping tool; it does not move money between your accounts.