My artist husband likes to say that if I were in charge of our spending, we’d be sitting on milk crates instead of furniture and that if he were in charge, we’d have no retirement accounts.

The fact that we have both nice furniture and retirement funds is a testament to compromise — and the wealth-building power of marriage.

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Married people are significantly wealthier than single people in every age group, and the gap tends to widen as people approach retirement age. Married couples age 55 to 64 had a median net worth, excluding home equity, of $108,607 in 2011, the latest available Census Bureau figures show. By contrast, single men in the same age bracket were worth a median $14,226 and single women $11,481.

People would be smart to view marriage as a business arrangement in addition to a romantic one. Here’s what works for us:

  • Conduct due diligence

Before a “merger of equals,” companies can spend millions of dollars and countless hours scrutinizing each other’s financial details, performance and prospects. You don’t need to hire a fleet of lawyers and accountants, but knowing what each person owns and owes before marriage can prevent unpleasant surprises later.

  • Create your own financial statements

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You need two: a balance sheet showing your net worth as a couple — your assets minus your debts — and a cash flow statement, which shows your current incomes and expenses. Use these documents to judge your financial health, spot potential problems, such as spending more than you make, and track your wealth-building progress.

  • Draft your business plan

Successful businesses have to set priorities. So do couples, who have to figure out how to save for the future (retirement, emergency and college funds, for example), pay off the past (mortgages, student loans, credit card debts) and live their lives in the present (paying the bills and having some fun). You’ll need to decide together which are the most important and how to divvy up your income among them.

  • Appoint a chief financial officer

Chances are one of you is better at the day-to-day financial details, such as paying bills and monitoring financial accounts. Having one person take responsibility for these chores helps make sure they get done. The CFO does not, however, make financial decisions unilaterally. In a marriage, the partners are responsible to each other and should be making the big decisions together.