Have you had the money talk with your spouse?
Have you had the money talk with your spouse? · CNBC

You've unpacked the gifts and said your "I do's" this wedding season, but before you get settled into your newly married life after the honeymoon, it's a good idea to talk about your finances.

Whether you're about to get married, just married or have been married for years, it's important to sit down and have the money talk with your significant other. Sure it may seem like a no-brainer, but you'd be surprised by how many couples aren't on the same page with their finances. According to a new survey from Fidelity, 43 percent of the people could not say how much their partner earned and 10 percent of that group were off by $25,000 or more.

Read More Perils of bringing debt to a relationship

Having regular money talks that are transparent is key to financial success as a couple. Communication and honesty are the "most important things," said Victoria Fillet, a certified financial planner and founder of Blueprint Financial Planning in Hoboken, New Jersey.

Here's a strategy on how to have the talk.

Know your credit scores

If you're like most couples, money is one of the main reasons you argue. So as newlyweds, you want to get off to a good start with your finances. Experts suggest both getting your credit reports and talking through them. Now that you're married, your credit score affects the other person. If you want to get a loan for a house or car, your partner's bad credit could affect that. Forty-five percent of millennials acknowledge bringing credit card debt into the relationship, according to a recent study by NerdWallet.

If one partners' credit isn't as good as the other's, it is important "not to burden the other person," Fillet said. Figure out a plan where you pull together a joint account for the household expenses and necessities and separate accounts for the extra money after that. Then that person can use the extra money to pay off his or her debt. This helps put a fair and equitable plan in place for both of you.

Read More Your partner might be hiding debt from you

Take a look at your credit score, your credit history, your debts and assets so that you know exactly what you are working with. "The most important things is that nobody be surprised and you both work on it together because your married," said David Mendels, a certified financial planner at Creative Financial Concepts in New York City.

Budget together

Being a couple, it's going to be an adjustment thinking in terms of "my finances" to "our finances." A good way to plan together as a couple is to make a budget. Figure out what you each bring in, then try making a list of your monthly income and expenses. That includes your expenses that are a must, like your rent or mortgage, utilities and insurance. Then maybe grab a glass of wine and figure out what extra spending is most important to each of you, such as your gym membership or her manicures.