How CZK converting actually works
Wise converts EUR to CZK at the mid-market rate with a disclosed transaction fee — typically 0.4–0.6% all-in for major corridors. Revolut Standard converts free within its monthly FX allowance (€1,000), then applies a 0.5% spread; Premium and Metal tiers extend the free allowance. Bunq Premium offers free unlimited FX at mid-market for its supported currencies. Trade Republic auto-converts at competitive rates for CZK-denominated brokerage trades.
Watchouts and hidden costs
Revolut Standard adds a 1% weekend FX markup — execute conversions in business hours to avoid it. Some EU neobanks (challenger consumer-bank products) quote conversion rates that include a 1.5–2% hidden spread — verify against the mid-market on Wise's rate page or XE before committing.