Tax Alarm finds the paychecks and side income (Uber, Etsy, Upwork and similar) in your bank deposits and asks you once what each payer is. Only what you confirm counts. Because your bank only sees pay after tax, it asks for one paystub to learn your real salary and the tax already taken out; you can upload it to Documents or type in the figures.
From that it projects the year's income to December 31 and calculates the tax with the same engine as Your taxes, then sets what is withheld and any estimated payments against it. When you go from a refund to owing money, or the figure moves by more than $300, it tells you in the app and by email, with one action and an exact amount: extra withholding on line 4(c) of your W-4, or a sum to set aside each month until April. Tap any number to see how it was calculated.
One-off pay — an RSU vest, a bonus, a commission — is counted once, never for every paycheck left. On the paystub, say how much of the gross is one-off pay, this paycheck and year to date; payroll and a read paystub fill it in for you to check. If you leave it blank, a paycheck far above your usual one is treated as a one-off. Add the vests and bonuses still to come under Vests and bonuses still to come: each is counted on its date, withheld at the 22% federal supplemental rate (37% on supplemental pay above $1,000,000 in a year) unless you enter your employer's rate, and at California's 10.23% (6.6% for a commission), New York's 11.70% or, in Arizona, your Form A-4 rate (set it under For the calculation; 2.0% until you do — Arizona's tax itself is a flat 2.5%). When your own tax bracket is higher than the rate withheld, Countorra calculates the difference you'll owe in April.
Once your W-2 for the year is confirmed on Your taxes and your paychecks have stopped, Tax Alarm uses its box 1 wages and box 2 withholding instead of a projection.
Under every projection, Based on these accounts and paychecks lists exactly what it was calculated from: the accounts your counted pay landed in (name, bank and last four digits only), each paycheck and side income with how it is counted (paystub, W-2 or deposits), the year's withholding, and each estimated tax payment you recorded. You see it on the Tax Alarm, on Settings → Taxes, on Lifeline and in the iPhone app.
When the data looks incomplete, a notice says what is missing, how it can change the number, and the one thing that fixes it: an income account that isn't connected or needs you to sign in again, a bank that hasn't updated for more than 3 days or whose balance hasn't moved for far longer than usual, an account whose history starts after January, a month with no paycheck from a regular payer, or a paycheck that is late. Fix it and the Tax Alarm recalculates.
- It is a projection of the year from the income so far: a new job, a raise or a quiet month changes it, and it recalculates when new income arrives. A single large deposit, such as a cash bonus, isn't read as a raise.
- Federal results are before tax credits, so the real tax may be lower. Side income is counted before the business expenses you enter.
- Tax Alarm is part of Countorra Tax. Its emails follow the Taxes topic in Settings → Notifications.