For the 2025 tax year (taxes filed in 2026), single individuals under 65 generally do not need to file a federal tax return if their gross income is below $15,750. For married couples filing jointly, the threshold is $31,500 if both are under 65, and up to $33,100 if one is over 65.
Who must file. Generally, any person in a trade or business who receives more than $10,000 in cash in a single transaction or in related transactions must file a Form 8300. By law, a "person" is an individual, company, corporation, partnership, association, trust or estate.
One lump sum of more than $10,000, or. Installment payments causing the total cash received within one year of the initial payment to total more than $10,000, or. Previously unreported payments causing the total cash received within a 12-month period to total more than $10,000.
Payments to non-employees for personal services must be reported on an “information return,” commonly called a Form 1099-NEC, if the payment is $600 or more in a calendar year.
The "20k rule" refers to the traditional IRS threshold for reporting income from payment apps and online marketplaces on Form 1099-K: over $20,000 in gross payments AND more than 200 transactions in a calendar year. While a law (the American Rescue Plan) temporarily lowered the threshold to $600, recent legislation, the One Big Beautiful Bill Act (OBBBA) (OBBBA), has reinstated the $20,000/200-transaction rule for tax years starting in 2025, providing relief for casual sellers and gig workers.
You generally don't have to file U.S. federal taxes if your income falls below the standard deduction for your filing status (e.g., single, married) and age, but you might still need to if you have self-employment income over $400, certain investment income, or received Social Security benefits that become taxable due to other income. Even if not required, filing is smart to claim refundable credits or get refunds, but some people, like certain low-income seniors or those with only non-taxable income, are typically exempt.
The IRS late filing penalty is 5% of the unpaid taxes for each month or part of a month a return is late, capping at 25%, with a minimum penalty of $525 (for 2026 returns) if filed over 60 days late, though this minimum is the lesser of that amount or 100% of the tax owed. Penalties accrue on the unpaid tax, so file on time even if you can't pay, as there's also a separate failure-to-pay penalty, and the failure-to-file penalty is reduced by the failure-to-pay penalty amount each month.
This is the amount of money you're allowed to earn each tax year before you start paying Income Tax. For the 2025/26 tax year, the Personal Allowance is £12,570. If you earn less than this, you usually won't have to pay any Income Tax.
This is in addition to the following individuals who, even under the old rules, were not required to file: (1) individuals earning purely compensation income whose annual taxable income does not exceed P250,000; (2) individuals whose income tax has been correctly withheld by their employer; (3) individuals whose sole ...
The IRS 3-year rule generally refers to the statute of limitations for claiming a tax refund, which is typically 3 years from when you filed your original return or 2 years from when you paid the tax, whichever is later, for the IRS to process your claim. For an audit, the IRS generally has 3 years from the date your return was filed or due (whichever is later) to assess additional tax, though this can extend to 6 years if you significantly underreport income or omit foreign income.
Your personal allowance is how much you can earn before paying income tax. For people who earn less than £100,000 per year, this has stayed at £12,570 for the 2025/26 tax year. If you earn between £100,000 and £125,140, the allowance decreases by £1 for every £2 you earn above £100,000, until it reaches £0.
No, the IRS doesn't catch every instance of unreported income, but their advanced data-matching systems catch most discrepancies involving third-party reporting (like W-2s, 1099s for freelance/interest/dividends) through automated checks, leading to CP2000 notices and potential penalties if missed; however, cash income, crypto, or lifestyle mismatches can also trigger scrutiny, though it's less certain than reported income, and high-income non-filers are a current focus.
If you deposit $10,000 or more in a single transaction, you must report it to the IRS. Additionally, you must report multiple deposits that total $10,000 or more if they occur within 24 hours, or if they add up to $10,000 or more within a 12-month period and are related to the same transaction.
Not reporting all of your income is an easy-to-avoid red flag that can lead to an audit. Taking excessive business tax deductions and mixing business and personal expenses can lead to an audit. The IRS mostly audits tax returns of those earning more than $200,000 and corporations with more than $10 million in assets.
The IRS does not check every tax return. It does not check the majority of them, but the IRS implements methods that track certain factors that would result in a further examination or audit by them.
The IRS continues to identify people who have a filing requirement but have failed to file a return. By law the IRS may file a substitute return for you if you do not voluntarily file. A series of letters is first sent explaining the possible action IRS may take as part of the Substitute for Return Program.
Ten Red Flags that Could Trigger an IRS Audit