Above six permits a month, hiring a Singapore customs agent loses money.

ACRA business name S$15, sole proprietorship registration S$100. Singapore Customs does not sell the permission to declare; it attaches it to a UEN that ACRA already sold you. There is no capital test at either end.

1. Buy the UEN, because it is the only thing Customs asks for

   ACRA business name S$15, sole proprietorship registration S$100. Singapore Customs does not sell the permission to declare; it attaches it to a UEN that ACRA already sold you. There is no capital test at either end.

   US$500 × 1.2792 = S$639.60 − S$115 = S$524.60

2. Activate the Customs Account the same afternoon, for nothing

   Activation “does not require the payment of any fees to Singapore Customs” and is decided within four working hours where no documents are needed. Register as a Declaring Agent in the same breath. The governance framework will place you in DA Basic, which is not a rejection — the FAQ is explicit that nobody fails.

3. Sit SC 401 once and stop buying qualifications

   Fifty questions, open book, 90 minutes, 70% to pass, S$29.96. SC 101 and SC 102 are optional and the page says so. Every hour spent on a logistics diploma is an hour not spent on the only scarce input here, which is clients.

   S$524.60 − S$29.96 = S$494.64

4. Take one seat, not two

   S$50 once to register the account ID, then S$20 a month for it and S$20 a month for a single user ID. That S$40 is the whole fixed cost of the business and the whole reason it exists: it is the number your clients cannot justify and you can.

   S$494.64 − S$50 − S$40 = S$404.64 working float

5. Sell only to importers filing under six permits a month

   At S$10 a permit the client’s own account overtakes you at 5.87 permits a month. Above that line they are overpaying and will eventually work it out. The whole addressable market is the tail that files occasionally: one-off machinery imports, seasonal stock, sample shipments, small e-commerce sellers. Sell to the frequency, not the industry.

   40 + 3.19n = 10n → n = 5.87

6. Count clients, not permits, because the price cancels

   Whatever you charge, the number of clients at their ceiling is 6,436 ÷ 40 = 160.9. Raising the price to S$20 drops the permits you need from 946 to 383 and drops each client’s ceiling from 5.87 to 2.38 by exactly the same factor. Price is a lever on effort per client, never on how many you need.

   (6,396+40) ÷ 40 = 160.9 clients, at every P

7. Cap the consignment value, not the keystroke count

   Section 128L(1) prices an incorrect declaration at S$10,000 or the tax payable, whichever is greater. On a S$10 fee that is a thousand-to-one exposure, and Nabilah Binte Jaafar Al-Kathiri’s S$11,400 fine on S$946 of GST is what the greater-of clause looks like in a courtroom. Decline anything dutiable, anything controlled, and anything where you cannot see the invoice. The business is only viable on consignments whose worst case is small.

   946/mo × S$6.81 − S$40 = S$6,402.26 = US$5,005