My husband and I were married in 2019. We have generally kept our finances pretty separate. We have separate credit/savings accounts and credit cards but recently opened a joint high yield savings account for wedding gifts. I initially added $20K of my savings to the account in order to get bonus cash into the account, and my husband contributes $250 per month. Ideally we want to use this account for big shared expenses (kids' tuition, vacations, etc.). Daily shared expenses like food and utilities, we split using Venmo. I am more of a saver and sometimes can be overly frugal; my husband is more of a spender and likes to spend money on nice material items. However, he has become more of a saver since we met, and I have learned to spend money on nicer things such as clothes which last longer and make me feel more put together.
Several months before getting married, I bought a condo in DC in my name since we weren't married at the time and I had the money saved up and a better credit score than him. My family also helped me with the downpayment. Since then, we have been living together in the condo and splitting the mortgage. We are trying to pay it off early so we are both contributing more than the minimum. My husband makes about 10% more than me, but he has more expenses, such as a car payment and student loans, which I do not pay. He does not share the details of how much makes or spends on these items, and I have generally felt that he was embarrassed to share or wanted to keep it private for some reason. He says that I tend to be controlling when it comes to money, and that may be why. However, I come from a family that is very financially savvy and has done a good job of saving, investing, etc., while his family spends more and, he himself admits, is less in control of their finances. I feel like I am trying to imitate my family's financial decisions, and while my husband generally agrees with my approach (maximizing retirement accounts, putting more money towards the mortgage), there still is tension in our relationship regarding money and different spending/saving habits that we each have.
A few weeks ago I asked about taxes this year (first year filing married), and my husband expressed a desire to file separately because of a student loan-related credit that he mistakenly took and would have to pay for. He said that he didn't want my return to cover that expense for him. I didn't really understand the issue and asked if we could compare married-filing-separately and married-filing-jointly in TurboTax and then make the decision on how to proceed. He said OK. A few weeks passed, and I suggested we start our taxes. Then my husband tells me that he already filed taxes his separately. I felt lied to and betrayed, especially knowing that he went behind my back to file knowing that we had agreed to work on it together. It got worse when I realized his decision would negatively impact me. Doing some research, I realized some of my healthcare costs and mortgage interest from this year put me well above the standard deduction amount, but since my husband chose the standard deduction option, I would be required to do so as well. That meant I would lose a few thousand dollars in savings on my tax return. He didn't realize this. Also, my husband was unable to deduct his student loan interest as a result of filing separately, but strangely he didn't seem to care.
We had a very large argument about it. He said that he didn't want to share his financial information with me because he thought I would be judgmental. I told him that I would not judge how much he had in his accounts or how much debt he had; I was willing to be fully transparent on my end and thought we both should be, especially now that we are married. I told him that I felt like I lost my trust in him and that he was hiding something. After some more discussion and tears, eventually we found that he could amend his return to itemize his deductions so I would be able to as well. However he wouldn't budge on wanting to keep his finances private / filing taxes separately.
I am concerned that this secrecy is a red flag and a serious problem in our relationship. In my family, all the couples I know who have been happy and financially successful pool their resources, have shared financial values, and are fully transparent with one another. I can understand that my husband might be embarrassed that he has less in savings than I do, but I still feel like we should feel comfortable being honest with one another. I have offered to do whatever it takes to convince him that I won't be judgmental, to no avail. I should note that my husband has lied to me twice before about somewhat similar issues over the 6+ years we have been together (i.e., issues where he was embarrassed for me to know the truth because he thought it made him look bad). Do you think my husband's lie is a serious relationship red flag, or something that is understandable considering his finances are first and foremost his business? Is it unreasonable for me to want us to be fully transparent? What else can I do to improve this situation and our relationship? Appreciate any advice.