What is Source of Funds?
Evidence showing where the money for a specific transaction came from, such as salary, business income, an asset sale, inheritance, or documented crypto gains.
Also known as: SOF
Source of funds is the compliance question banks ask when money arrives and they want to know where this specific pile of money came from. If you cannot explain it clearly and document it cleanly, accounts get frozen, transactions get delayed, and compliance starts treating you like a problem.
What Counts as Source of Funds
Common examples include:
- salary or wages
- business revenue
- sale of real estate
- sale of shares or a business
- inheritance
- divorce settlement
- documented crypto gains
The key word is documented. A story without records is not source of funds.
Source of Funds vs. Source of Wealth
These are related but different:
- Source of funds = where this transaction came from
- Source of wealth = how you became wealthy overall
If you wire $400,000 into a bank, the bank may ask for source of funds for that transfer. If you are opening private banking, they may also ask for source of wealth more broadly.
Why It Matters for Crypto
Crypto holders run into this constantly.
From a compliance perspective, "it's from crypto" is not enough. Banks may want:
- exchange statements
- wallet records
- trade history
- tax filings
- invoices or business records if the crypto flowed through a company
This is why so many people get blindsided by exchange freezes or bank reviews. The issue is often not that the money is illegal. The issue is that the documentation is missing, fragmented, or incoherent.
Why It Matters for Privacy
Privacy-minded people often focus on keeping their name off public records but forget that banks and payment providers care more about documentation than slogans.
A privacy-preserving structure is only useful if the money moving through it still makes sense on paper.
Key Takeaway
Source of funds is not just a banking nuisance. It is one of the main choke points where privacy plans succeed or fail. If you expect to move serious money, you need records that explain where it came from before compliance asks.
Related Terms
AML/KYC & Privacy
The tension between Anti-Money Laundering (AML) and Know Your Customer (KYC) regulations — designed to prevent financial crime — and individual privacy rights, as these compliance requirements create vast databases of personal financial information and enable mass financial surveillance.
Blockchain Surveillance
The practice of analyzing public blockchain transactions to identify, track, and de-anonymize cryptocurrency users — conducted by companies like Chainalysis, Elliptic, and CipherTrace that sell surveillance tools to governments, law enforcement, and financial institutions.
FATCA (Foreign Account Tax Compliance Act)
A US federal law requiring foreign financial institutions to report accounts held by US persons to the IRS, and requiring US taxpayers to report foreign financial assets exceeding certain thresholds.
Travel Rule (Crypto)
A financial regulation requiring cryptocurrency exchanges and virtual asset service providers to collect and share sender and recipient identity information for transactions above a certain threshold — effectively extending banking surveillance rules to the crypto ecosystem.
Have more questions?
Use our guided flow to get the right next privacy step for Source of Funds.
Open Guided Flow