Getting started
EIN vs. ITIN: which number does a non-U.S. founder need?
One identifies a business. The other identifies an individual for federal tax purposes. Buying both is not automatically the right first step.
Read the guideTAX TALK WITH MADDY
Understand the rules.
Build with clarity.
Straightforward U.S. business and tax guides for founders working across borders. Start with the question in front of you.
Explore the guidesSTART WITH YOUR SITUATION
What are you working through?
THE FOUNDERS’ READING ROOM
One question.
A clearer next step.
Each guide explains the starting point, the facts that matter and where to check the official rule.
Browse the guides and tools below.
U.S. tax basics
A U.S. LLC is a legal structure, not a tax exemption
Understand the separate questions of state formation, federal classification, the owner’s tax position and ongoing reporting.
Read the guideForeign-owned LLCs
No sales? Your foreign-owned LLC may still have a reporting obligation
Owner funding, withdrawals and formation-related payments deserve a review even when customer revenue is zero.
Read the guideRecordkeeping
Your bank deposit is not your whole sales record
A practical way to connect client payments, processor fees, refunds and payouts without counting the same money twice.
Read the guideCross-border services
A U.S. client does not, by itself, determine the source of service income
For nonresident individuals, where services are performed is generally the starting point—not the currency or bank receiving the money.
Read the guideRecordkeeping
Owner paid the bill? Build an LLC transaction record that tells the whole story
Follow funding, personally paid costs, reimbursements and withdrawals with a worked example and a free CSV worksheet.
Read the guideA practical companion
Reconcile your next payout
Find an unexplained difference before it becomes an unexplained accounting entry.
Try the tool ↗USEFUL WITHOUT A SIGN-UP
Two ways to work through the numbers.
Owner-transaction worksheetRecord owner payments, flag missing evidence and download your CSV. ↗Payout reconciliation calculatorCompare one settlement with the amount received in the bank. ↗
Entries stay in your browser. These tools organise and reconcile records; they do not calculate your tax liability.
WHEN YOUR FACTS NEED A CLOSER LOOK