How would you like it if you knew your partner was keeping a secret from you? For most couples, this is a deal breaker. Once the other one finds out, they feel betrayed. Financial secrets are some of the worst because they rob the other partner of that feeling of safety. For that reason it’s best not to keep any financial secrets from your partner.
One kind of secret is purchases. Unplanned or secret purchases big or small can be detrimental to the relationship.
Another kind of secret is planning to hide cash in the event the relationship doesn’t workout.