Jessica Simpson has learned a lesson so many divorced women can relate to.

Almost a decade has passed since singer-turned-fashion-mogul Jessica Simpson and ex-husband Nick Lachey split.

But this week, Simpson, 35, finally revealed that her relationship breakdown taught her one tough lesson all divorced women can relate to.

When asked what her biggest money mistakes have been, she revealed that her marriage to Lachey, 41, was a serious financial mistake.

“The biggest money mistakes? I don’t know. For some reason I thought of my first marriage,” the 35-year-old told host Kelly Evans on CNBC’s Closing Bell.

Simpson, whose net-worth is now estimated to exceed $1 billion, married Lachey without entering a prenuptial agreement. Given that her income at the time of their separation was thought to far out-weigh Lachey’s, the couple’s 2005 divorce and the messy splitting of assets that followed dominated tabloids for months.

Unfortunately, the financial burden of divorce felt by Simpson is all-to-familiar to women who’ve endured a relationship breakdown.

In Australia, the cost of divorce just got higher, as well:

In May it was revealed that the government has introduced massive court fee hikes for divorce applications. Since July 1, some fees placed on separated couples are thought to have risen by up to 50 per cent. That means that the fee for applying for divorce has risen from from $845 to $1,200.

The divorce tax will mean an added $87 million in revenue from the Family Court, Federal Circuit Court and Federal Court of Australia, according to Fairfax Media.

The rising cost of divorce to Australians could very well hit struggling families, in particular single mothers.

According to Lachey, not having kids with Simpson was “probably the best thing” given their short-lived marriage, the singer-songwriter told Dirty, Sexy, Funny with Jenny McCarthy on SiriusXM.

Whilst some of us have lasting memories watching the two’s first year as a married couple on Newlyweds: Nick and Jessica, in the years that have passed both Simpson and Lachey have happily remarried.

Both have gone on to have two children each. Simpson, is mother to three-year-old daughter Maxwell Drew, and two-year-old son Ace Knute, with current husband Eric Johnson.

Meanwhile, Lachey, 41, has a son Camden John, 2, and an eight month old daughter, Brooklyn Elisabeth, with wife Vanessa Lachey.

“There’s just no contact. We’ve both moved on with our lives, and I think we are very happy it went the way it went. It’s not animosity, it’s not friendship – it’s just kind of nothing,” Lachey explained.

Have you ever been through a costly divorce?