If you and your partner haven't worked on your finances together, Bach says the best place to start is by getting all of your financial documents organized. Once you know where your money is, you can create a plan together and take control of your finances.
Get several file folders and label them for the various aspects of your financial life: tax returns, retirement accounts, savings and checking accounts, credit card debt, insurance and so on. "It's really helpful for couples to sit down, spend an hour or two around the coffee table and put together these file folders," Bach said. Most importantly, be diplomatic rather than demanding when you ask your partner for help.
In addition to creating a filing system for paper documents, Bach recommends using an app such as Mint or Clarity Money to keep track of your financial accounts and where your money is going. Once you're organized, it will be easier to set a budget and stick with it.