For some same-sex spouses, love and marriage is giving way to paperwork and planning.
The Supreme Court ruling that struck down a key provision of the Defense of Marriage Act means that from now on, the Internal Revenue Service will treat legally married same-sex spouses as married for federal tax purposes.
That could mean couples have to follow new rules for everything from filing tax returns to planning inheritances and gifts.
These aren't new issues for tax experts and estate planners, but experts say it can be a steep learning curve for same-sex couples who for years handled things differently.
"These are all things we have done for years for opposite sex couples," said Marci Flanery, a Seattle accountant. "It's not really new ground—it's new ground for same-sex couples."
(Read more: Here's what Americans really do with tax refunds)
Flanery said some same-sex couples she works with have kept their finances largely separate. They can still do that, but they'll need to calculate some information jointly for tax purposes.
Others have set up other legal workarounds to allow them to own property jointly or leave an inheritance to one another. Now, some of those arrangements may need to be reworked because of the federal recognition of their marriage.
Few people revel in delving into financial paperwork or learning about tax law. But Pan Haskins, a tax accountant in the San Francisco Bay Area, said most same-sex spouses she works with are not too bothered by a little added work, or even a higher tax bill than before.
"I'm finding that they're just so happy to be able to get married," she said.
(Read more: What same-sex couples need to know about taxes)
Still, Haskins said many same-sex couples may be so happy about the emotional part of being married that they haven't considered what they should be doing to make sure they have their financial plans in order.
"It's the things they're not asking," she said.