Understanding Forex Spreads
Learn what forex spreads are, how they affect your currency exchanges, variable vs fixed spreads, and tips to minimize spread costs.
The Hidden Cost of Currency Exchange: Spreads
When you exchange currency, the difference between the buy and sell price is called the "spread." This seemingly small difference can cost you hundreds of dollars on large transfers. Understanding spreads helps you choose better exchange options and save money.
What Is a Spread?
The spread is the difference between what a provider charges to buy currency versus what they pay to sell it.
USD/THB: 35.50 / 35.52
Bid: 35.50 | Ask: 35.52 | Spread: 0.02 THB
• Bid (35.50): Price they'll buy 1 USD from you
• Ask (35.52): Price they'll sell 1 USD to you
• Spread (0.02): Their profit margin on the trade
Spread Comparison: Same Rate, Different Cost
For a $10,000 USD exchange to THB, look at how spreads affect your total:
| Spread Quality | Rate (Bid/Ask) | Spread | Cost on $10k |
|---|---|---|---|
| Good Spread | 35.50 - 35.52 | 0.02 THB | 0.06% |
| Average Spread | 35.45 - 35.52 | 0.07 THB | 0.20% |
| Poor Spread | 35.30 - 35.52 | 0.22 THB | 0.62% |
💡 On a $10,000 transfer, a "poor" spread costs you ~$62 more than a "good" spread!
Variable vs Fixed Spreads
Variable Spreads
- • Change based on market volatility
- • Widen during economic news
- • Tighter during stable periods
- • Common in forex brokers
- • Can be better for active traders
Fixed Spreads
- • Stay constant regardless of market
- • Predictable costs
- • Usually wider than best variable
- • Common in money transfer services
- • Better for casual users
Tips to Minimize Spread Costs
Compare Spreads Before Exchanging
Always check both the exchange rate AND the spread. A slightly better rate with a wider spread can cost you more.
Avoid Peak Hours for Large Amounts
Spreads often widen during high volatility (economic announcements, market open/close). For large transfers, time it wisely.
Use Services with Transparent Pricing
Money transfer services like Wise and Remitly typically offer better spreads than traditional banks.
Calculate Total Cost
Spread cost = (Ask - Bid) × Transfer Amount. For $10,000 with 0.20 THB spread, that's 2,000 THB (~$56) lost to spread.
Who Offers Better Spreads?
Ranked from best to worst spreads:
- 1.Forex Brokers: Tightest spreads (0.1-0.5 pips) but require trading accounts
- 2.Money Transfer Services (Wise, Remitly): Transparent spreads, typically 0.4-1%
- 3.Currency Exchange Counters: Variable, often 1-3% spread
- 4.Traditional Banks: Widest spreads, typically 2-5% markup
Get More THB for Your USD
Monitor rates and spreads with FX Alert to make informed exchange decisions.