How a Seoul-Based Startup Cut Its International Payment Costs by 80% Using Binance
Minjae runs a 14-person product studio in Mapo-gu, Seoul. His team builds mobile apps for clients in the United States, Germany, and Singapore. Six of his developers are based in Vietnam and Indonesia. Two designers work from Poland. One content strategist is in the Philippines.
Every two weeks, Minjae used to process ten international wire transfers. Each transfer went through his Korean corporate bank account via SWIFT. Each one costs between 25,000 and 45,000 KRW in outgoing fees. The receiving banks in Vietnam and Poland charged their own fees on arrival, often deducting another 10,000 to 20,000 KRW equivalent from the contractor's payment. The transfers took two to four business days to arrive. Contractors sent follow-up messages asking where their money was. Minjae spent time every payment cycle chasing confirmations and correcting shortfalls.
His total international payment cost was approximately 600,000 KRW per month, or 7,200,000 KRW per year. That is before accounting for the exchange rate spread his bank applied on USD conversions, which added another 0.5% to 1% on top of the flat fees.
In March 2024, Minjae switched to USDT payments on Binance. His monthly payment cost dropped to under 15,000 KRW. His annual savings exceeded 7,000,000 KRW. His contractors received their payments within five minutes of each transfer. The follow-up messages stopped.
This article explains exactly how he did it, what the setup process looks like, and how other Seoul-based founders can replicate the same result.
The Problem with SWIFT for Startup Payments
SWIFT is the global standard for international bank transfers. It works, but it was built for a different era of finance. A SWIFT transfer passes through multiple correspondent banks before reaching its destination. Each bank in the chain may deduct a fee. The sender pays an outgoing fee. The recipient's bank may charge an incoming fee. The exchange rate applied at each conversion point is set by the bank, not by the market, and it typically includes a spread of 0.5% to 2%.
For a startup making ten payments per month of 1,000 USD each, the total cost of SWIFT transfers can reach 2% to 4% of the total payment value. On 10,000 USD per month in contractor payments, that is 200 to 400 USD per month, or 2,400 to 4,800 USD per year, spent entirely on moving money from one place to another.
The problem compounds when contractors are in countries with less developed banking infrastructure. Payments to Vietnam, Indonesia, and the Philippines often arrive later than expected and with unpredictable deductions. Contractors in these markets sometimes receive 5% to 10% less than the invoiced amount after all bank fees are applied. The startup then has to top up the shortfall, adding another transaction and another fee.
Speed is also a real cost. A payment that takes three business days to arrive is a payment that a contractor has to wait for. For contractors managing their own cash flow, this delay creates friction in the working relationship. Several founders have reported losing good contractors to competitors who paid faster.
Why USDT on Binance Solves the Problem
USDT is a stablecoin pegged to one US dollar. It holds its value at exactly 1 USD regardless of market conditions. Sending USDT from one Binance wallet to another costs 1 USDT in network fees on the TRC20 network, regardless of the amount being sent. A 500 USD payment and a 50,000 USD payment cost the same 1 USD to transfer.
The transfer completes in one to five minutes. There are no correspondent banks, no exchange rate spreads applied by intermediaries, and no arrival deductions. The recipient receives the exact amount sent, minus 1 USDT.
For startups that pay contractors in USD, USDT is a direct substitute. The contractor invoices in USD. The startup sends USDT. The contractor converts USDT to their local currency through their own exchange account at the market rate. The total cost of the transaction is 1 USD on the sender's side and a small conversion fee on the recipient's side, typically 0.1% or less.
Minjae's contractors in Vietnam and Indonesia already had Binance accounts before he made the switch. His contractors in Poland set up accounts within a week of being asked. The setup process for each contractor took about 40 minutes, including identity verification. After that, payments took five minutes and cost 1 USDT each.
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How to Set Up Binance for International Contractor Payments
The setup process for a founder using Binance as a payment tool takes one afternoon. Here is the exact sequence.
Register and complete KYC. Create a Binance account using your email address. Complete identity verification using your Korean ID, driver's license, or passport. KYC approval typically takes a few minutes to a few hours. Use natural light when photographing your ID and remove glasses before the face scan to pass on the first attempt.
Enable Google Authenticator. Download Google Authenticator on your phone. Link it to your Binance account through Security settings. Write down the 16-character backup key on paper and store it somewhere safe. This key is the only way to restore your authenticator if you change phones.
Fund your account with USDT. Buy USDT on Upbit or Bithumb using KRW. Transfer the USDT to your Binance wallet using the TRC20 network. The transfer fee is 1 USDT. Confirm the network on both sides before sending. Send a small test amount the first time to verify the address is correct.
Collect contractor wallet addresses. Ask each contractor to provide their Binance USDT deposit address on the TRC20 network. Save each address in a payment spreadsheet alongside the contractor's name, invoice amount, and payment date. Verify the first three and last three characters of each address before sending any payment.
Process payments. On payment day, open Binance, go to Wallet, select Withdraw, choose USDT and TRC20 network, paste the contractor's address, enter the amount, and confirm. The transfer arrives within five minutes. Send a message to the contractor confirming the payment and the TXID (transaction ID) so they can verify on the blockchain if needed.
A real example: Sooyeon, the operations lead at a Seoul-based design agency, manages payments for nine overseas contractors. She processes all payments on the first and fifteenth of each month. Each payment cycle takes about 20 minutes using Binance. Her previous process using bank wire transfers took two hours and required follow-up for three to four days. Her agency now saves approximately 5,400,000 KRW per year in wire fees.
What the Numbers Look Like for Different Payment Volumes
The saving from switching to USDT payments scales directly with payment volume. Here is how the math works at different levels.
A startup paying five contractors 1,000 USD each per month spends approximately 5,000 USD per month on contractor payments. SWIFT fees at 2% cost 100 USD per month, or 1,200 USD per year. USDT transfer fees at 1 USD per transfer cost 5 USD per month, or 60 USD per year. Annual savings: 1,140 USD.
A startup paying ten contractors 2,000 USD each per month spends 20,000 USD per month. SWIFT fees at 2% cost 400 USD per month, or 4,800 USD per year. USDT transfer fees cost 10 USD per month, or 120 USD per year. Annual savings: 4,680 USD.
A startup paying fifteen contractors at various amounts totaling 50,000 USD per month spends 600,000 USD per year on contractor payments. SWIFT fees at 1.5% cost 750 USD per month, or 9,000 USD per year. USDT transfer fees cost 15 USD per month, or 180 USD per year. Annual savings: 8,820 USD.
The percentage saving stays consistent at around 80% regardless of payment volume. The absolute saving grows with volume. For startups with high contractor headcounts or large individual payments, the financial case for switching is clear.
Handling Tax and Record-Keeping for Crypto Payments
Using USDT for contractor payments creates a record-keeping obligation. Korean tax authorities require businesses to document all payments to contractors, including the method of payment and the KRW equivalent at the time of each transaction.
Keep a payment log that records the date, contractor name, USDT amount, KRW equivalent at the time of payment, TXID, and the purpose of the payment. The KRW equivalent can be calculated using the USDT/KRW rate on a major Korean exchange at the time of the transaction.
Issue payment receipts or confirmations to contractors as you would for any other payment method. For contractors who are registered businesses in their home countries, provide a record of the USDT amount and the USD equivalent for their own invoicing and tax purposes.
Consult a Korean tax professional familiar with crypto transactions before your first payment cycle. The regulatory framework for business crypto payments in Korea is clear in principle but requires careful application in practice. Getting the record-keeping right from the start avoids complications at year-end.
A real example: Junho, the CFO of a 20-person SaaS company in Gangnam, maintains a Google Sheet that logs every USDT payment with the date, recipient, amount, TXID, and KRW equivalent. He exports this sheet to his accountant at the end of each quarter. His accountant confirmed that the records meet the documentation requirements for business expense deductions under Korean tax law.
What Contractors Think About Being Paid in USDT
Most contractors in tech-adjacent fields are familiar with crypto and have no objection to receiving USDT. For contractors who are new to crypto, the setup process is straightforward, and the benefits are clear: faster payments, no bank deductions, and the ability to hold USD-equivalent value without a foreign currency bank account.
Some contractors in markets with volatile local currencies actively prefer USDT. A developer in Indonesia or Vietnam who receives USDT can hold it as USD-equivalent savings without the currency risk that comes with converting to local currency immediately. Several of Minjae's contractors told him they appreciated the option to choose when to convert, rather than being forced to convert at whatever rate their bank offered on the day of arrival.
The only contractors who have expressed hesitation are those in markets with strict capital controls or unclear crypto regulations. For these cases, Minjae continues to use SWIFT for the specific individuals affected and uses USDT for everyone else.
Switching to USDT payments on Binance is one of the most straightforward cost reductions available to any startup with an international team. The setup takes one afternoon. The savings start from the first payment cycle. The operational improvement, faster payments, fewer follow-ups, no arrival deductions, is immediate and permanent.