Creator Tax Calculator

$39.00

a 1099 creator whose income swings from $1,100 in one quarter to $6,400 in the next, instead of setting aside a round 30% and hoping.

Local-firstNo telemetry — nothing phones homeNo lock-inNo migration

Type in what you made this quarter and it gives you one figure: the dollars to move into the tax account, with self-employment tax and the income-tax reserve already added together.

$39, paid once. That is the whole thing: the SE tax breakdown, the reserve, the per-quarter estimate, the annual plan and the voucher split. Nothing renews, so there is nothing to cancel, and every figure you type stays on your machine.

The bill in January was bigger than the whole month

Your best quarter was Q4. The brand money landed, the affiliate payout cleared, and you spent some of it because you had earned it.

Then April arrives and you owe on income that showed up nine months ago and has since become a couch.

The rate is not what stings. What stings is that self-employment tax gets levied on top of income tax, and nobody sends you a payslip showing the withholding, because there is not any. If your income were the same every month, you could set aside a percentage and stop thinking about it. It is not. You made $1,100 one quarter and $6,400 the next, and a flat percentage of a number that moves like that is not a plan. It is a guess, and it is wrong in one direction or the other.

Three commands, one number

  1. Run estimate --income 4000. It computes self-employment tax on that quarter, applies the reserve percentage, and returns the amount to set aside.
  2. Run annual --q1 2000 --q2 6000 --q3 1000 --q4 5000 when the year was lumpy. It walks each quarter and totals the set-aside for the whole year.
  3. Run voucher --annual 8000 --withholding 0 to split what you owe into four equal quarterly payments.

What the math actually is

  • Self-employment tax is computed the Schedule SE way: 92.35% of net earnings, then 12.4% for Social Security up to the wage base and 2.9% for Medicare with no cap at all. The Social Security and Medicare figures come back separately, so the total is not a black box you have to take on faith.
  • The Social Security wage base is $176,100 for 2026. Earn past it and the 12.4% stops while the 2.9% keeps going, which is the one thing most creators get wrong when they estimate by hand.
  • The income-tax reserve defaults to 28%. Change it per run with --pct 0.3, or set RESERVE_PCT once in a .env file and forget it. If your state takes a bite, raise it.
  • annual handles a $1,000 quarter sitting next to a $6,000 quarter without averaging them into a lie.
  • voucher takes what is owed for the year, subtracts your withholding, and hands back four equal amounts you can actually pay.
  • Set OUTPUT_FOLDER and annual writes a JSON and Markdown report package as well. Leave it unset and the tool writes nothing to your disk at all, which is the default.

Built for no withholding. Not built to file.

Built for a 1099 creator earning somewhere between $20,000 and $150,000 a year with no withholding, who has never once been confident about the balance in the tax account.

Not for you if you want something that files. It does not file. It is not a CPA, it does not sign a return, and it does not know your state, your dependents, your QBI deduction, or the camera you wrote off in March. It is a set-aside calculator and nothing more. If you need advice, hire a person, and hand them this so they start from a real number.

TurboTax, QuickBooks Self-Employed, and an actual accountant

An accountant beats this on every question with judgment in it, and on the one thing it cannot do at all, which is sign and file your return. TurboTax and QuickBooks Self-Employed are better at categorising transactions and getting the thing submitted, and each costs more per year than this costs once.

What none of them do well is tell you, in March, what to move out of the checking account for a quarter that looked nothing like the last one. That gap is the entire product.

What leaves the machine

Nothing does. Income figures go in as command-line flags or a .env value and come back out in your terminal. There is no account, no upload and no sync. The only file it ever writes is the optional annual report, and only if you set OUTPUT_FOLDER yourself. Leave that unset and it touches your disk exactly zero times. What you earn is nobody’s business, including ours.

$39 once, and the yearly caveat

Thirty-nine dollars, one payment. Nothing renews.

The rates are 2026 constants, and they have to be reviewed every tax year. That is stated plainly in the source, in src/calc.ts. The Social Security wage base moves, and when it moves, so does the answer. Check that the constants match the tax year you are planning for before you rely on a number.

The first answer takes one command. There is nothing to configure.

Security and privacy

Handles a creator’s income figures (per-quarter or annual). Security is designed in.

Principles
Local-first. All inputs come from CLI flags or .env on disk and are never transmitted anywhere; nothing in this tool touches the network. Nothing is uploaded, no telemetry, no cloud dependency.
Non-destructive. No source documents are read or modified — inputs are typed numeric values only.
Least privilege. Writes only under OUTPUT_FOLDER, and only when it is set — every calculator works with zero file writes.

Protections implemented (v0.1.0)
Path-traversal defense — the generated report filename is sanitized (safeSegment) and every write is checked with assertWithinRoot(), so the annual plan report can’t be written outside OUTPUT_FOLDER.
Fail-fast config validation — clear errors for an invalid RESERVE_PCT before any calculation runs.
Restrictive permissions — the generated report (creator-annual-plan-*.json / .md) is written 0600.
Deterministic, pure calculationsrc/calc.ts has no I/O and no hidden state; the same inputs always produce the same output, making the math auditable and unit-testable.
Secrets discipline.env and generated Tax-Plans/ output are git-ignored; no financial data in the repo.

NOT tax advice
This tool produces a planning estimate for 2026, not a filed return or professional tax advice. It uses simplified, federal-only self-employment tax and reserve-percentage constants hard-coded in src/calc.tsthey must be reviewed and updated every tax year (the SE tax rates, Social Security wage base, and a reasonable default reserve percentage all change or should be reconsidered annually). It does not account for: state taxes, the Additional Medicare Tax (0.9% over $200k/$250k), the Net Investment Income Tax, credits, AMT, the qualified business income (QBI) deduction, business expense deductions, or the IRS’s annualized-income installment method. Always have a CPA review the plan before remitting payment.

Distribution / AV trust

Known limitations / roadmap
– Federal only — no state estimated-tax calculation.
seTax() assumes no other W-2 Social Security wages reduce the wage-base room; a creator with both W-2 and 1099 income should have a CPA verify the combined SE tax.
– The reserve percentage is a flat heuristic (default 28%), not a bracket-based income-tax projection — it is a cushion, not a precise liability calculation.
– SE tax rates, the Social Security wage base, and the default reserve percentage are 2026 estimates hard-coded as constants — must be updated yearly before use in a new tax year.

Reporting
Report suspected vulnerabilities privately to the maintainer before public disclosure.

Frequently asked questions about Creator Tax Calculator

What does the Creator Tax Calculator do?

The Creator Tax Calculator is built for people with lumpy, unpredictable income: creators, freelancers, and 1099 earners whose money arrives in bursts rather than an even paycheck. You enter income as it lands, or as you project it, set a reserve basis, and the tool returns two things that are hard to eyeball on your own: the quarterly estimated payment to make and the percentage of each deposit you should set aside so a big month does not become a painful surprise the following spring. It estimates self-employment tax, sizes your quarterly payments, and helps you hold back a sensible reserve.

The reason a dedicated tool helps is that irregular income breaks the usual mental math. When a paycheck is steady, taxes feel automatic. When one month brings a large brand deal and the next brings almost nothing, it is easy to spend money that was really the government’s share. The creator tax calculator turns each payment into a clear set-aside amount as it arrives, so the reserve grows alongside the income instead of being reconstructed in a panic at filing time. That running discipline is the whole point.

Self-employment tax is a big part of why creators get caught out, and it is worth understanding the obligation. The IRS Self-Employed Individuals Tax Center explains that self-employed individuals generally must pay self-employment tax as well as income tax. That extra layer, covering Social Security and Medicare, is on top of ordinary income tax, and it is precisely the piece a simple mental estimate tends to forget. The tool builds it into the reserve so your set-aside reflects the real total, not just the income-tax slice.

What the tool does not try to be is tax-filing software or a replacement for an accountant. It does not file your return, and it does not know every deduction your specific situation allows. It is an estimator and a reserve planner, focused on the timing problem that trips up creators most. You can see how entering income and setting a reserve basis produces quarterly amounts on the product page, and how it sits within our tools for creators and agencies managing uneven income.

Sold once as a one-time purchase, the creator tax calculator is meant to live beside your income as it comes in, quietly answering the question that stresses freelancers the most: how much of this is actually mine to keep. You enter what you earned, it tells you what to set aside and what to pay each quarter, and the surprise goes out of tax season. That narrow scope is deliberate, because the timing of estimated taxes on irregular income is a real and specific problem, and solving just that well is more useful to a creator than a bloated tool that tries to do everything and helps with none of it clearly. The habit it encourages is the valuable part. When you set aside the right slice of every payment the day it arrives, the reserve is simply there when a quarterly deadline or the annual return comes due. There is no borrowing from next month and no bill that seems to appear from nowhere. For many creators, that shift from reactive scrambling to a quiet, steady set-aside is the first time taxes have felt manageable rather than like an ambush waiting at the end of a good year.

How does the Creator Tax Calculator help me avoid underpayment penalties on irregular income?

Underpayment penalties happen when you do not pay enough tax through the year, and creators are especially exposed because no employer is withholding for them. The Creator Tax Calculator addresses this directly by turning your income into quarterly estimated payment figures and a reserve percentage as the money arrives. Instead of discovering at filing time that you owe far more than you set aside, you get a running answer to what each quarter’s payment should be, based on what you have actually earned so far.

The mechanism rests on how the tax system expects self-employed people to pay. The IRS explains at its Self-Employed Individuals Tax Center that self-employed individuals generally must pay self-employment tax as well as income tax, and it expects that tax to be paid across the year through estimated payments rather than all at once. The tool sizes those quarterly amounts so you can make them on time, which is the plain way to stay clear of an underpayment penalty in the first place.

Irregular income is exactly where this gets hard, and where a creator tax calculator earns its keep. A quarter with a big sponsorship needs a larger payment than a quiet one, and guessing wrong in either direction costs you: too little invites a penalty, too much ties up cash you needed. By recalculating as income lands, the tool keeps your estimated payments in step with reality rather than assuming an even year that a creator almost never has. That responsiveness is the difference between a rough guess and a usable number.

It is important to be honest about the limits. The tool produces estimates, and your final tax depends on deductions, credits, other household income, and rules specific to your situation that only a full return or a tax professional will pin down exactly. The creator tax calculator is a planning aid, not a guarantee against every penalty, and it does not file your quarterly payments for you. Those payments still have to be made to the IRS on the schedule the IRS sets.

Used consistently, though, it changes the shape of the year. You can see how the quarterly figures are produced on the product page, and how it fits our resources for creators and agencies. The honest benefit is that you stop being surprised. Each quarter you have a defensible number to pay and a reserve already set aside to cover it, drawn from the IRS’s own framing of self-employment and estimated tax. That steadiness is what keeps uneven creator income from turning into an underpayment penalty and a scramble for cash every April when the bill finally comes due. It also helps to know that the safe-harbor rules the IRS uses to judge underpayment reward consistency. Paying reasonable estimated amounts across the year, rather than nothing until spring, is what keeps you on the right side of them. The tool cannot promise a specific outcome for your return, and your accountant may refine the numbers, but a creator who makes sensible quarterly payments tied to real income is in a far stronger position than one who ignores the quarters and hopes to settle everything at once. Making the payments on time is the part only you can do, and the calculator exists to make sure you always know the amount.

Where does my income data live in the calculator, and is it safe?

Your income figures live in the entries you make and keep, not in a hosted account tied to your bank or your tax return. That matters because income data is about as sensitive as personal information gets. It shows exactly what you earn, from whom, and when, and for a creator that picture is something most people would rather not have sitting on someone else’s server. The tool is built to estimate from the numbers you provide, so the record of your earnings stays with you.

The Federal Trade Commission offers a plain model for handling data like this. Its business guide, Protecting Personal Information, frames security as take stock, scale down, lock it, pitch it, and plan ahead. For your income data, that means knowing what you hold, keeping only what you need, protecting the place it lives, clearing out what is stale, and having a plan if a device is lost. The creator tax calculator fits that model because it does not require uploading your full earnings history to an outside service to do its arithmetic.

Income and tax data is a common target precisely because it is valuable, which is why keeping fewer copies in fewer places is sensible. A tool that estimates from figures you control does not spin up a separate cloud copy of your earnings as a side effect. That aligns with the FTC’s advice to scale down what you keep and lock down what remains. The less your income data is scattered across free web tools and half-forgotten accounts, the smaller the chance it turns up somewhere you did not intend.

You remain responsible for the basics on your own machine. A strong login, disk encryption, and regular backups are still your job, the same as for any file that lays out your finances. The creator tax calculator does not remove that responsibility, and it should not claim to. What it does is avoid adding new exposure, so protecting your income data is mostly about guarding your own device rather than trusting a chain of free calculators with the details of what you make.

The honest summary is that data safety here rests largely with you, which suits a creator who would rather keep earnings private. If you apply the FTC’s take-stock and lock-it steps to wherever you keep your income entries, you cover the ground that matters most. You can see how the estimation flow is structured on the product page before deciding how to store your figures. The tool is designed so that keeping your income private means guarding your own storage, not handing a full account of what you earn to a website in exchange for a rough estimate you could hold yourself. There is a quiet benefit to keeping it all in one place you own. Over a year, your income entries become a tidy record of what you actually earned and when, which is exactly what a tax professional asks for at filing time. Rather than gathering screenshots from several free tools and platform dashboards, you can hand over a single consistent picture. Good privacy and good recordkeeping usually point the same direction here, and following the FTC’s scale-down and lock-it steps for your own figures serves both at once without any extra effort on your part.

How is the Creator Tax Calculator different from free web calculators or a spreadsheet?

Free web calculators and spreadsheets both fall short in the same place: they assume a tidy year. A typical online estimator asks for an annual income figure and gives you one number, which is close to useless when your income arrives in unpredictable bursts. A spreadsheet can do better, but only if you build and maintain the self-employment tax logic, the quarterly timing, and the reserve math yourself. The Creator Tax Calculator is purpose-built for irregular creator income, so it handles those pieces without you constructing them from scratch.

The clearest difference is that the tool works as income lands, not once at year end. You enter each payment as it arrives or as you project it, and the estimate updates, keeping your quarterly figures and reserve in step with a year that refuses to be even. A one-shot web calculator cannot do that, because it never sees the shape of your income, only a single guessed total. For a creator, that shape is the whole problem, and ignoring it is why generic tools give answers that feel wrong.

Another difference is what the tool actually accounts for. It builds in self-employment tax and a reserve percentage, and it handles capital gains on sold assets, which most free calculators ignore entirely. That matters because creator income is not only brand deals and subscriptions. The IRS also describes Form 1099-K as a report of payments you received for goods or services during the year, and platform and card payments reported that way are exactly the kind of income a creator tax calculator is built to fold into an honest estimate rather than leave out.

There is also the matter of trust and privacy. Many free calculators are ad-supported and want your income figures on their servers. This is a one-time purchase that estimates from numbers you keep, so you are not trading your earnings data for a rough answer. You can compare the workflow on the product page, and see how it fits our tools for creators and agencies who deal with uneven income all year.

What the tool does not do is replace filing software or an accountant, and it does not pretend the estimate is your final tax. Free tools sometimes imply a precision they cannot deliver. This one is honest about being a planning estimate that keeps you ahead of your quarterly obligations, not a substitute for a real return. If your taxes are simple and steady, a free calculator may be fine. If your income is lumpy, self-employment tax applies, and you want a reserve you can trust, that is the specific gap the creator tax calculator is built to fill for people whose earnings never look like a paycheck. The one-time price fits that audience too. A creator watching every recurring cost does not need another monthly subscription to manage taxes on income that is already unpredictable. You buy the tool once, and it keeps sizing your quarterly payments and reserve for as long as you earn irregularly. Weighed against a free tool that assumes an even year, or a subscription that adds one more fixed bill to an uneven income, a single purchase that actually understands lumpy earnings is usually the more sensible choice for the creator it was made for.

Does the calculator handle capital gains and income reported on a 1099-K?

Yes on both, and both matter more to creators than people expect. Alongside quarterly estimates and self-employment tax, the Creator Tax Calculator accounts for capital gains on sold assets, so a year where you sell equipment, a domain, or other property is not left out of your planning. Many free estimators treat income as a single wage-like number and quietly ignore gains, which produces a reserve that is too low the moment you sell something. Folding gains into the estimate keeps your set-aside honest across the different ways creator money actually shows up.

The 1099-K side is just as important. A growing share of creator income flows through payment platforms and cards, and the IRS describes Form 1099-K as a report of payments you received for goods or services during the year. That form reports gross payments, which will not always match what you keep after fees or refunds, and it can surprise creators who did not realize a platform would report their earnings. The tool helps you treat that reported income as part of your estimate rather than something you discover only when the form arrives.

The practical value is reconciliation and readiness. Because the creator tax calculator lets you enter income as it lands, you build a running picture of what you earned through every channel, gains and platform payments included. When a 1099-K shows up in January, you already have your own record to compare it against, which makes it far easier to spot a mismatch while you still remember the transactions. That is a much better position than trying to reconcile a gross platform total against your memory months later.

Be clear about the boundary, though. The tool estimates and plans, it does not file your return, calculate the exact basis on every sold asset, or resolve how a specific 1099-K should be reported on your particular return. Those are jobs for tax software or a professional, and capital gains in particular can get complicated fast. The creator tax calculator gives you an organized, honest input to bring to that process, not a final answer that replaces it.

You can see how income entry and the reserve basis work together on the product page. Used through the year, handling gains and 1099-K income inside the same estimate means your reserve reflects your whole financial picture, not just the easy parts. Pair that with the IRS guidance on the 1099-K and on self-employment tax, and you walk into filing season with a reserve already sized for the income you truly earned, including the sales and platform payments that generic calculators leave a creator to discover the hard way. The broader lesson is that creator income has more moving parts than a single wage figure, and a reserve built on that oversimplified figure will almost always be too small. By accounting for self-employment tax, capital gains, and platform-reported payments together, the tool gives you a set-aside that matches the messy reality of how creators actually get paid. That completeness is unglamorous, but it is the difference between a reserve that holds up when the return is finally prepared and one that leaves you short at exactly the wrong moment.

Attributes Value
Deployment

On-Premises

Platform

Windows

License Type

Perpetual

Billing Period

One-Time

Target Customer

Creators & Agencies

Free Trial

No

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