A practical guide to the US compliance year
The US compliance calendar runs across the IRS, fifty state revenue departments and Secretaries of State, the SSA for payroll year-end, and the USPTO on event-driven cycles. The good news: most deadlines are predictable. The bad news: missing a Form 941, an annual report, or a Section 8 declaration creates exposure that compounds. Below is the rhythm we plan US client engagements around.
Form 1040 — the individual tax season
The Form 1040 personal return is due April 15 each year, with an automatic six-month extension to October 15 available via Form 4868. Estimated taxes are due quarterly (April 15, June 15, September 15, January 15) for self-employed and high-income individuals. Failure to pay enough during the year triggers an estimated tax penalty even if the final return shows no balance due. For overseas Americans, the June 15 automatic extension applies plus FBAR is due April 15 with its own extension to October.
Form 1120 / 1120-S / 1065 — the entity tax cycle
C-Corps (Form 1120) file by April 15 for calendar-year corporations, or the 15th day of the fourth month after fiscal year-end. S-Corps (1120-S) and partnerships (1065) file by March 15. Both can extend six months. Late filing of S-Corp or partnership returns triggers a per-shareholder/partner penalty that adds up fast on multi-member entities. Quarterly estimated tax for C-Corps follows a similar April/June/September/December cadence.
Payroll — Form 941, Form 940 and the W-2 reconciliation
Form 941 is due at the end of each month following the quarter (April 30, July 31, October 31, January 31). Form 940 (FUTA) is due January 31. Year-end produces W-2s to employees by January 31 and W-3 + W-2 transmittal to SSA also by January 31. Deposit schedule (monthly vs semi-weekly) depends on lookback-period liability. The IRS's Trust Fund Recovery Penalty can personally pierce the corporate veil for officers who wilfully fail to remit withheld payroll taxes — this is a serious risk we monitor closely.
State annual reports & franchise tax
Every US entity files an annual report with its state of incorporation — Delaware franchise tax is due March 1, California is due in the entity's anniversary month, Wyoming is due in the entity's anniversary month, Nevada is due in the entity's anniversary month. Late filing leads to "not in good standing" status, then administrative dissolution. We track every client's state annual deadline alongside IRS deadlines.
Sales tax — the post-Wayfair landscape
Since the Supreme Court's Wayfair decision (2018), economic nexus for sales tax kicks in for most states at USD 100,000 in sales or 200 transactions into the state. Marketplace facilitator laws shift collection to Amazon, Etsy, Shopify-style platforms in many states. The exposure is real — sellers can owe back sales tax in 20+ states without realising it. We map nexus footprint before quoting US sales tax compliance work.
FBAR, FATCA & Form 5471 — the overseas-American stack
US persons with foreign financial accounts above USD 10,000 aggregate file FBAR (FinCEN 114). Holdings above USD 50,000 (single) / USD 100,000 (joint) at year-end or USD 75,000 / USD 150,000 at any point trigger Form 8938 (FATCA) on the 1040 itself. Ownership of 10%+ of a foreign corporation triggers Form 5471. Ownership of a foreign partnership triggers Form 8865. Each of these has penalties starting at USD 10,000 per missed form per year. For US persons with Pakistani business interests, we handle the full stack.
USPTO trademarks — the post-registration maintenance
A registered USPTO trademark is not a "set and forget" asset. Between years 5 and 6, the owner must file a Section 8 Declaration of Continued Use. Optionally between years 5 and 6 the owner can file Section 15 for incontestable status. Every 10 years, Section 9 renewal plus Section 8 declaration are due together. Miss these and the registration is cancelled — far easier than the original application to lose. We set reminders 12 months before each deadline.
How we work with you
Our typical US engagement combines monthly bookkeeping in QuickBooks Online or Xero with quarterly federal and state tax estimates and annual entity-level returns plus the 1040. For overseas US persons, we set up a secure document folder and handle US filings end-to-end. Where engagements require representation before the IRS in audits or appeals, signature authority on Form 2848, or other services restricted to US-licensed CPAs and Enrolled Agents, we coordinate with vetted US-based counsel.