AI agents for business finance: what they can and can't do
What AI agents can do in bookkeeping, close, collections and compliance today, where a person must stay in charge, and how to judge a product.
The short answer
Banks are required to watch cash, so frequent or large deposits will draw questions, but cash is not illegal. In the US, banks report cash transactions over $10,000 in a day and in Canada receipts of $10,000 or more within 24 hours; in both, deliberately splitting deposits to stay under the threshold is treated as suspicious, and in the US structuring is a federal crime. Deposit cash as it comes, keep a record of where each amount came from, and declare it as income.
Why cash attracts attention
Hairdressing, catering, cleaning, care work, taxi and delivery shifts, event work and market trading often pay partly in cash, and tips are mostly cash. Banks abroad operate under anti-money-laundering rules that make cash a priority: it cannot be traced the way a transfer can. So a pattern of regular cash deposits, particularly into a personal account with a salary already arriving, will at some point trigger a question from the bank. That is normal and you can answer it. Problems start when the explanation is missing, inconsistent, or when the deposits look designed to avoid scrutiny.
The reporting thresholds
| Country | What the bank reports | Source |
|---|---|---|
| United States | Cash transactions over $10,000 by or for one person, including several that add up to over $10,000 in a day | FinCEN CTR notice |
| Canada | Receipt of $10,000 or more in cash in one transaction, or in two or more amounts within 24 consecutive hours, reported within 15 days with the source and purpose | FINTRAC |
FinCEN's customer notice says there is "no general prohibition against handling large amounts of currency" and that a report is filed regardless of the reason. A report is not an accusation. Other countries have similar regimes with their own thresholds; ask your bank what it needs.
Records that explain cash
The best defence is a paper trail made at the time. The IRS's guide to business records lists the kinds of documents that support income: deposit information, receipt books, invoices and similar records. For a worker paid partly in cash, that means:
- Payslips or a letter from the employer showing the cash portion, if your employer pays wages partly in cash.
- A simple daily log: date, client or shift, amount received, and how much you deposited.
- Receipt book copies or invoices for clients you work for directly.
- A note of tips kept separately, with the shift they relate to.
- Deposit slips or app records, matched to the log.
Worked example
Example: Funmi braids hair at home and is paid about £600 a week in cash, plus card payments. She deposits each Friday, writes the week's appointments and totals in a notebook, and gives each client a numbered receipt. When her bank asks why £2,400 in cash arrived over four weeks, she sends the log and receipt copies, and the totals match her deposits. If she had held the cash for months and deposited £8,000 at once, the same questions would be harder to answer.
Cash is still income
Cash earnings are taxable like any other. The IRS Gig Economy Tax Center says income must be reported even if it is paid in cash and even if no form arrives. Other tax authorities take the same view of cash earnings. Undeclared cash shows up in bank deposits that do not match your tax return, which is exactly what both banks and tax authorities look for. Means-tested benefits are affected as well: GOV.UK says banks may share information with the DWP, including transactions.
What to avoid
- Depositing cash for other people, or letting someone use your account; this is how money mules are recruited, see money mule offers.
- Holding large amounts of cash at home for long periods, then depositing it in one go.
- Giving the bank a different explanation from the one on your tax return.
- Mixing personal cash, savings circle (ajo) money and business takings without labels.
If the bank restricts your account
Sometimes a bank pauses an account or asks you to move your business elsewhere while it reviews cash activity. Banks are often not allowed to tell you everything about a review, but you can still act. Ask in writing what information they need, send your records promptly and keep copies, and ask whether a business account would suit your work better, since many banks expect regular trading income to go through one. If you think the bank has treated you unfairly, use its complaints process first, then the independent ombudsman or regulator in your country. Do not move the cash through a friend's account while you wait; that can create the very pattern banks are trained to report.
Money arriving from Nigeria raises related questions; see large deposits from Nigeria and source-of-funds letters.
Where Pryme fits
Pryme does not take cash deposits. Where it helps is in keeping the record clean once money is banked: send part of your earnings home with Send, which shows the rate and the fee before you approve, and generate receipts and statements for each transfer so your family support is documented alongside your income.
Questions people ask
Is it illegal to deposit a lot of cash?
No. FinCEN says there is no general prohibition on handling large amounts of cash; banks simply report transactions above the threshold.
What happens if I deposit over $10,000 in cash in the US?
The bank files a currency transaction report. It is routine. Splitting deposits to avoid it is a federal crime.
Why is my bank asking about my cash deposits?
Banks must monitor cash. Answer with your records: payslips, a log of jobs and amounts, and receipts.
Do I pay tax on cash tips and wages?
Yes. Cash income is taxable and must be reported, whether or not any form is issued.
Sources
- FinCEN: Notice to Customers, a CTR reference guide · accessed Oct 2026
- FinCEN: Ruling 2005-6, suspicious activity reporting (structuring) (15 Jul 2005) · accessed Oct 2026
- FINTRAC: Reporting large cash transactions (modified 19 Jan 2024) · accessed Oct 2026
- IRS: What kind of records should I keep (reviewed 3 Aug 2026) · accessed Oct 2026
- IRS: Gig Economy Tax Center (reviewed 9 Jul 2026) · accessed Oct 2026
- GOV.UK: Universal Credit eligibility · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.