How does it know my income?

From the paychecks and side income in your connected accounts, which you confirm once, and one paystub for your salary before tax and what's already withheld.

When does it tell me?

When you go from a refund to owing money, or the figure moves by more than 300 dollars: in the app and by email.

What about side income?

Side income from Uber, Etsy, Upwork and similar is counted at its pace so far, before the business expenses you enter. With a paycheck, the fix goes on your W-4; without one, it's a sum to set aside each month until April. A W-4 is federal only, so any state amount is set aside monthly.

It's calculated with the 2026 federal rules and your state's, from the income so far projected to December 31. A new job, a raise or a quiet month changes it, and it recalculates when new income arrives. Federal results are before tax credits, so the real tax may be lower.

Know your April tax bill in June.

Tax Alarm projects your year from the paychecks and side income in your bank deposits, calculates the tax with the same rules as Your taxes, and tells you when you're heading for a bill — with one fix and an exact amount. Countorra prepares your figures; it does not file your return.

Included in Countorra Tax.

United States, tax year 2026: federal income tax and self-employment tax, and state rules for California, Texas, Arizona, Florida and New York.

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Tax Alarm: you'll owe $1,840 in April, and the fix — put $132 on line 4(c) of your W-4.

Tax AlarmApril 2027, if nothing changes

Your 2026 returnYou’ll owe $1,840Federal $1,839.80 · Arizona $0 · recalculated as money comes in

The fix

Put $132 on line 4(c) of your W-4Each of your 14 remaining paychecks withholds $132 more, and April comes out even.

How it works.

Step 1
Confirm who pays you
Tax Alarm finds the paychecks and side income in your bank deposits and asks once what each payer is. Only what you confirm counts.
Step 2
Add one paystub
Your bank only sees pay after tax. One paystub gives your salary and the tax already taken out; upload it to Documents or type in the figures.
Step 3
See April now
It projects your income to December 31, calculates the tax with the same rules as Your taxes, and sets what's withheld against it.
Step 4
Get one fix
Heading for a bill, you get one action with an exact amount: extra withholding on line 4(c) of your W-4, or a sum to set aside each month until April.

How the example fix is worked outExample

Federal tax for 2026, calculatedOn $86,225.10 of pay, projected to December 31: −$10,139.52
Withheld this year at the current rate12 paychecks so far, 14 to come: +$8,299.72
You'll owe in April: $1,839.80
Extra on line 4(c) of your W-4$1,839.80 ÷ 14 paychecks, rounded up to the dollar: $132

At the current rate, $8,299.72 is withheld this year against $10,139.52 of calculated federal tax, so $1,839.80 would be owed in April. Spread over the 14 paychecks left, that's $132 each, rounded up — put it on line 4(c) of your W-4 and April comes out even.

Illustrative figures, not from any real account.

Why it matters.

No surprise in April: You find out in June, while there are paychecks left to fix it, not when you file.
One action, an exact amount: Not a range: the amount for line 4(c), or the sum to set aside each month.
See how it was worked out: Tap any number in Tax Alarm to see the calculation behind it.

Common questions.

Start with 7 days free.

New accounts choose Countorra Management or Countorra Tax and add a card. Nothing is charged during the trial, and if you cancel before it ends, you pay nothing.

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Know your April tax bill in June.

How it works.

Confirm who pays you

Add one paystub

See April now

Get one fix

Why it matters.

Common questions.

How does it know my income?

When does it tell me?

What about side income?

How exact is it?

Which plan includes it?

Related features.

Start with 7 days free.