Tax
Quarterly estimated tax for non-resident-owned Delaware LLCs: usually none required
Quarterly estimated tax is a US concept for US-resident taxpayers. Most non-resident-owned LLCs owe no estimated tax payments. Here is when they do.
When estimated tax applies
IRS requires estimated tax payments when expected federal tax liability exceeds $1,000 and withholding does not cover at least 90% of current-year tax (or 100% of prior-year tax, 110% for high earners). Most non-resident-owned single-member Delaware LLCs do not meet this threshold because the LLC is disregarded for tax purposes and the foreign owner has no US-source income with US tax obligation (typically).
Exceptions: (a) US-source ECI flowing to the foreign owner via the LLC, (b) US-citizen LLC owner with US tax obligation on LLC income, (c) C-corp election forcing LLC-level tax.
How to verify your situation
Your CPA can run a quick assessment based on your LLC structure and revenue sources. If your CPA flags estimated tax as required, use Form 1040-ES (individuals) or Form 1120-W (C-corp-electing LLCs).
Estimated tax due dates: April 15, June 15, September 15, January 15 (following year).
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