Hey, it’s Jeffrey — back again!
I bet you’ve heard or even said this before when getting a raise: "I'm going to jump a tax bracket." Or "I'm going to owe so much more." So much grumbling.
The thing is, it's almost never correct. But saying "that's not how brackets work" doesn't really land until you show people the actual math.
So I built a test scenario with real 2026 numbers, a realistic dual-income household getting a meaningful raise, and ran it through the prompt I'm sharing today.
The output shows you exactly what's happening layer by layer, in dollars, so the math is impossible to argue with. And you can test it for yourself, too.
Here's the prompt. Plug in your own numbers:
I want to understand how my raise actually affects my taxes — and whether the "jumping a tax bracket" fear is real or overblown.
Here are my details:
Filing status: [Single / Married Filing Jointly / Married Filing Separately / Head of Household]
If Single or Head of Household:
Current salary: [X]
New salary after raise: [X]
If Married Filing Jointly or Married Filing Separately:
My current salary: [X]
My new salary after raise: [X]
Spouse's income (if any): [X]
Note: use our combined household income when applying the tax brackets, but calculate the additional tax owed only on my raise amount
Pre-tax 401k contributions:
Mine: [X per year] (2026 limit is $24,500 per person)
Spouse's (if applicable): [X per year] (same $24,500 limit per person)
Pre-tax HSA contributions:
Coverage type: [Self-only / Family]
If self-only: limit is $4,400 per person
If family plan: limit is $8,750 total shared between spouses
Amount contributed: [X per year]
Please use 2026 federal tax brackets and the 2026 standard deduction. Assume I take the standard deduction unless I say otherwise.
Structure your response in this order:
What my raise actually nets after federal tax — lead with this number
My taxable income before and after the raise (gross minus standard deduction minus pre-tax contributions)
How my income sits in the federal tax brackets layer by layer, before and after
My effective tax rate and marginal tax rate before and after
Exactly how much additional federal tax I owe on just the raise
Flag if any of my inputs change which bracket I'm in, and explain what that means in dollar terms — not just percentages. Note this covers federal tax only and is not a substitute for advice from a tax professional.
Here's what came up when I ran it on a test scenario with hypothetical numbers 👇
The prompt led with this: a $30,000 raise netted $23,400 after federal income tax. That's 78% of the raise kept. The bracket didn't move at all — every dollar of the raise sat inside the existing 22% layer.
The more interesting part: the test scenario landed $2,600 below the next bracket threshold. And when I asked what crossing it would actually cost in dollar terms, the answer was $20 per $1,000 of income above the line. On a $5,000 bonus that pushed $5,000 into the next bracket, the extra tax would be $100.
That's the number people never calculate. The fear is almost always bigger than the math.
Two things most people miss when they're doing this in their head:
First, nine out of ten taxpayers take the standard deduction. In 2026, that's $16,100 for single filers and $32,200 for married filing jointly. Most people forget to subtract that, along with their 401 (k) contributions, before the bracket math even starts. Your taxable income is almost always lower than the number you're worried about.
Second, even when you do cross into a higher bracket, only the dollars above the threshold get taxed at the higher rate. Not your whole salary. Not even your whole raise.
Keep going? Want to go further? Try these follow-up prompts after you get your initial result:
If you're close to a bracket threshold: "I'm [filing status], and my taxable income after the raise puts me within $[X] of the [24% / 32%] bracket. What are the most practical ways to reduce my taxable income before year-end — like increasing my 401k contribution or funding an HSA — and how much would each one save me in federal tax?"
If you want to run the bonus version: "I'm also expecting a [year-end bonus / commission / RSU vesting] of approximately $[X]. Using the same tax setup from before, how does that additional income interact with my bracket? What does it actually cost me in federal tax, and does it push me into the next bracket?"
If you're curious about your effective rate over time: "Based on my tax situation above, what would my effective federal tax rate be if my salary grew 5% per year for the next five years, assuming standard deduction and the same 401k contributions? At what point would I cross into the next bracket?"
AI tip worth trying this week: Meeting records to task list
I've become genuinely addicted to meeting recordings. Many video call tools, like Zoom, will generate a transcript automatically if you turn on recording. Once the meeting ends, I drop the transcript into Claude and ask for two things: a quick to-do list of action items, and then I just start chatting with it about what was discussed.
That second part is the game changer. Instead of trying to take complete notes during the meeting or going back through the recording or trying to remember what someone said, you can just ask. "What did we decide about X?" "What did she say the timeline was?" Claude knows the whole meeting.
Stop typing what you could say in 10 seconds.
Wispr Flow turns your voice into clean, professional text inside any app. Emails, Slack, client updates — speak once, send without editing. 4x faster than typing.
One quick note: This newsletter is for educational purposes only and does not constitute financial advice. I'm not a financial advisor — just someone sharing ideas and tools I've found useful. Use what works for you, skip what doesn't, and always do your own research. Some links may be affiliate links or sponsored content for which I may receive compensation.