| Filing status can change your tax brackets, your standard deduction, and when certain “extra” taxes kick in. The married vs single tax outcome usually comes down to whether combining incomes creates a wider bracket benefit (often the case when incomes are uneven) or pushes you over key income thresholds tied to investment income, high wages, or deductions. If you’re getting married or divorced, a quick withholding check can prevent a surprise tax bill. |
A lot of people expected a major “tax reset” in 2025 because of the expiring TCJA tax provisions. But the One Big Beautiful Bill Act (OBBBA) became law on July 4, 2025, and it kept in place many of the rules.
As you consider tax planning for 2026, I’d frame it like this: the question is less “What brand-new tax system am I in?” and more “Where does my tax filing status change the math?” The two places that matter most are (1) how income stacks into brackets, and (2) where thresholds kick in for credits and add-on taxes.
One important note about how we work at Sachetta: I don’t look at taxes as a standalone project. I look at taxes alongside your investments, cash flow, and long-term financial plan as part of our wealth management service, because those pieces affect each other all year.
It depends on how your income is split between two people.
One simple way to see this for the 2026 tax year (income earned in 2026 for your tax return filed in 2027), the 37% bracket starts at $640,600 for single filers and $768,700 for married filing jointly. The married number is higher, but it isn’t double—so stacking two similar incomes is where the “pinch” can appear.
When people talk about the “tax benefits of marriage,” they’re usually talking about two things.
1) Wider brackets for many income ranges: For the 2026 tax year, several brackets are close to double for married filing jointly. For example, the 24% bracket starts at $105,700 (single) and $211,400 (married filing jointly). The 22% bracket starts at $50,400 (single) and $100,800 (married filing jointly).
2) A larger standard deduction when you file jointly: The 2026 standard deduction is $16,100 for single filers and $32,200 for married filing jointly.
This is where I like to clear up a common misconception: there isn’t a special “marriage tax deduction” that appears out of nowhere. The change is your filing status, and that changes the standard deduction amount and certain thresholds across the return.
The standard deduction makes sense when you don’t have enough deductions to exceed it; often the case if you rent, have a paid-off home, or your mortgage interest, state/local taxes, and charitable giving are relatively modest. In 2026, the standard deduction is $16,100 for single filers and $32,200 for married filing jointly.
Itemizing makes sense when your deductible expenses add up to more than the standard deduction. The most common drivers are mortgage interest, state and local taxes (often abbreviated as “SALT,” like real estate taxes and state income tax), and charitable gifts. If you’re a homeowner in a higher-tax state like Massachusetts, itemizing is worth revisiting in 2026.
One reason why itemizing will be a bit more common under OBBBA, is mainly because the cap on the state and local tax deduction increased to $40,400 in 2026 (with an income-based phaseout). For Married Filing Separately, the SALT cap is lower (for example, $20,200 in 2026), which is one reason I don’t view separate filing as a simple “fix.”
Sometimes, yes, especially when one spouse earns significantly less than the other. Filing jointly can create more room in lower tax brackets, which can mean some investment income is taxed at lower rates than it would be if the higher earner were filing as a single taxpayer.
But here’s the part that catches people off guard: some “extra tax” thresholds tied to investment income aren’t doubled for married couples. One example is the Net Investment Income Tax (NIIT), a 3.8% additional tax that can apply to certain investment income (like capital gains, dividends, and interest) once income exceeds $200,000 for single filers or $250,000 for married filing jointly.
This is exactly where I think integrated planning matters. It’s not just a filing choice. It’s also about how your income is paid (wages, bonuses, equity comp) and how your investments produce taxable income (gains, dividends, interest) over the year.
This is another “threshold tax” that surprises dual earners. Employers must start withholding the additional Medicare tax once an employee’s wages exceed $200,000, regardless of filing status.
That means a couple can end up under-withheld or over-withheld depending on how each spouse’s income is paid. For me, this is less about squeezing out an extra deduction and more about keeping your cash flow steady so your saving and investing plan stays on track.
The main difference is the income cutoff. The Child Tax Credit starts to shrink once your income gets “too high,” and the point where that shrink starts is higher for married couples filing jointly than for single filers.
In other words, for higher earners, getting married and filing jointly can sometimes help you keep more of the credit than you would as two separate single filers.
For reference, in 2026, the maximum Child Tax Credit amount is described as up to $2,200 per qualifying child.
I treat Married Filing Separately as a tool for specific situations, not a default strategy. Sometimes it comes up when a couple is separating, when there are liability concerns, or when one spouse wants to keep tax matters fully separate.
But in many cases, filing separately can limit credits and deductions, and it can still leave the core “marriage penalty” dynamics in place. Filing separately generally is not a clean way to avoid a marriage tax penalty, and it can cost you other benefits.
For most Massachusetts households, state taxes won’t change the married vs single math much. The main exception is a one-time high-income year, because Massachusetts adds an extra 4% surtax above about $1 million, and that threshold isn’t doubled for married couples filing jointly. If you’re heading into a year with a large bonus, business sale, or taxable income connected to an inheritance, it’s worth modeling the impact ahead of time.
In my opinion, yes. A filing-status change is one of the easiest ways to end up with a surprise tax bill if you don’t update your withholding.
After marriage or divorce, I suggest doing three quick things:
This is one of the simplest ways to avoid surprises in the married vs single tax comparison.
If you take nothing else away, take this: “married vs single tax” is mostly about brackets and thresholds. Brackets often help couples in many income ranges, but some thresholds (like NIIT) are not doubled, and the top bracket is not fully doubled.
I also hope no one makes marriage or divorce decisions based on taxes. What I do think is reasonable is using marriage or divorce as a planning checkpoint, because it affects your cash flow, investment strategy, and the way taxes show up over time.
If you’re planning to get married or divorced in 2026, you may want a second opinion on how your filing status, withholding, and investment income will work together. We can review your situation through an integrated wealth management and tax-planning lens.
If this topic is relevant to you, you might want to learn more about becoming a client—our clients turn to us for advice on this and similar topics. Take the next step that feels right for you.
FAQs:Do married couples always pay less tax than two singles? No. Some couples get a marriage bonus, and some see a marriage penalty. The difference usually comes from how your incomes stack into brackets and where threshold taxes kick in. When does Married Filing Separately make sense? Sometimes during separation, or when a couple needs extra separation for liability reasons. But it is not a universal way to reduce taxes, and it can reduce credits and deductions. How do married vs single thresholds affect the 3.8% NIIT? NIIT thresholds are $200,000 single and $250,000 married filing jointly, so combining incomes can trigger NIIT sooner than people expect. Should we change our withholding after getting married? In my experience, yes. It is one of the easiest ways to avoid an unpleasant surprise at filing time, especially in dual-income households. |