How to Convert Fiat to USDC: A Complete Guide for Businesses
The problem with converting fiat to USDC today
Most businesses that need USDC follow the same painful path: receive fiat into a bank account, transfer it to a crypto exchange, trade it for USDC at a spread, then withdraw USDC to an on-chain wallet. Each step costs money and time:
- Bank transfer fees and FX spreads on the way in
- Exchange trading fees (typically 0.1–1.5%)
- Withdrawal fees and network gas on the way out
- Two separate platforms to reconcile, with delays at each hop
There's a better way. With 1TCH, incoming fiat is automatically converted to USDB (a USD-pegged stablecoin held in your custodial wallet) and can be sent on-chain as USDC in a single step — no exchange account, no manual trading.
How fiat-to-USDC conversion works on 1TCH
1TCH combines a fiat bank account and a custodial stablecoin wallet in one product. Here's the flow:
- 1. Open a FIAT on-ramp account — Choose USD, EUR, GBP or MXN. You get a real virtual bank account with routing number, IBAN, or sort code.
- 2. Receive a bank transfer — A client sends you a Wire, ACH, SEPA, Faster Payments or SPEI transfer to that account.
- 3. Automatic conversion — Incoming fiat is converted to USDB in your custodial wallet. No manual trade, no order form, no waiting for a fill.
- 4. Withdraw on-chain as USDC — Send USDC to any blockchain address (Ethereum, Solana, Base, Polygon and more) directly from your wallet.
The entire path — from a client's bank transfer to USDC on a blockchain — can happen in one business day, through one platform, with one audit trail.
Which fiat currencies and rails are supported?
1TCH supports the major fiat currencies used in global business:
- USD — Wire and ACH
- EUR — SEPA
- GBP — UK Faster Payments
- MXN — SPEI
Each currency gets its own virtual account with local banking details, so senders pay standard domestic transfer fees — not expensive international wire rates.
Which chains can you withdraw USDC to?
Once fiat is converted to USDB in your custodial wallet, you can send it on-chain as USDC to:
- Ethereum
- Solana
- Base
- Polygon
- Arbitrum
- Optimism
- and other supported chains
This means you can pay a contractor, settle an invoice, or move treasury to a cold wallet — all without touching a crypto exchange.
Why this beats using a crypto exchange
Running fiat-to-USDC through an exchange means three separate platforms (bank, exchange, wallet), three sets of fees, and three points of failure. 1TCH collapses it into one:
- One platform — bank account and stablecoin wallet together.
- One conversion — automatic, no manual trading or spread to watch.
- One audit trail — every transfer, conversion and withdrawal in one transaction history.
- Compliance built in — KYC/KYB handled up front, so conversions are compliant by design.
Use cases: who benefits most
- Businesses paying global contractors in USDC — fund with fiat, pay out on-chain, skip the exchange.
- Web3 companies — receive fiat from non-crypto clients, convert to USDC for treasury or payroll.
- Freelancers — get paid in fiat by traditional clients, hold and withdraw in USDC.
- Cross-border teams — one balance, rails for every region, on-chain payouts on demand.
Get started
Open a free account at 1tch.app/register, verify in under a minute, open a FIAT on-ramp account, and you're ready to convert incoming fiat to USDC automatically. No exchange account, no trading fees, no spread.