A no-IOF credit card looks like the holy grail of international spending for Brazilians. It isn't. Once you isolate the FX spread, the 'zero IOF' offers from Nubank Ultravioleta, BTG Cashback IOF Zero and Sicredi become expensive marketing. We ran the numbers line by line — who wins, who loses, and in which scenario.
13 min de leitura
Are 'No-IOF' Brazilian Credit Cards Worth It? The Math Nubank Ultravioleta, BTG and Sicredi Won't Show You
SUBTITLE
In May 2026, "zero IOF" marketing exploded in Brazil. The real math, using effective rate per USD 100, shows that in most cases no-IOF cards lose to Wise or Nomad even with the 3.5% IOF tax.
EXCERPT
A no-IOF credit card looks like the holy grail of international spending for Brazilians. It isn't. Once you isolate the FX spread, the "zero IOF" offers from Nubank Ultravioleta, BTG Cashback IOF Zero and Sicredi become expensive marketing. We ran the numbers line by line — who wins, who loses, and in which scenario.
KEY_TAKEAWAYS
- IOF (a Brazilian tax on international purchases) is 3.5% as of May 2026, not 6.38%.
- A "no-IOF card" only wins when its FX spread is also low. A 5% spread with zero IOF is worse than a 1% spread with 3.5% IOF.
- Nubank Ultravioleta offers 1% cashback that offsets part of the IOF, but Nubank's spread sits between 1.5% and 2.5%, depending on the BIN.
- BTG Cashback IOF Zero is mathematically the most interesting product — for existing Single-tier clients or above with high monthly volume.
- Sicredi's promotional zero-IOF is worth it for co-op members with recurring USD/EUR spending.
- For the average Brazilian spending up to USD 1,500/month abroad, Wise and Nomad remain unbeatable even paying 3.5% IOF.
- The difference between "marketing" no-IOF cards and Wise with IOF ranges from USD 0.60 to USD 1.50 per USD 100 spent. For most, irrelevant.
BODY
The May 2026 hype
May 2026 went down as the month "zero IOF" became standard banking ad copy in Brazil. Four weeks, serial launches:
- Nubank Ultravioleta announced 1% cashback on all international purchases, framed as "IOF neutralization".
- BTG Pactual launched BTG Cashback IOF Zero, with a genuine waiver for Single-tier and above.
- Sicredi offered promotional zero IOF through December 2026 for co-op members.
- Banco Inter expanded partial cashback on international purchases.
- Itaú updated its Click card with FX benefits.
Consumer reaction was predictable: mass card-switching, viral "I now spend abroad with zero IOF" videos, LinkedIn spreadsheets celebrating savings.
Almost all wrong.
IOF, as of May 2026, is 3.5% on international purchases. No longer 6.38%. That number is the tax ceiling — not your total cost. The real cost of a card is IOF + FX spread + day-rate difference. Eliminating the IOF while keeping a 5% spread is more expensive than paying 3.5% IOF with a 1% spread.
This article runs the numbers. No affiliates, no sponsorship, no fluff.
1. What changed in IOF in 2025-2026
The IOF rate on international credit card purchases dropped from 6.38% to 3.5% in the reduction cycle started in 2024 and frozen in 2026. In parallel, IOF on cash exchange and international remittances also dropped, aligning fiscal cost across channels.
This backdrop is what created room for "no-IOF" marketing. When IOF was 6.38%, waiving the tax meant very relevant savings. Today, at 3.5%, the impact is smaller — and can be swallowed by an elevated FX spread.
2. Why "no IOF" doesn't mean "cheap FX"
The final cost of an international purchase via card is composed of three elements:
- Base rate (USD/BRL on statement closing or posting date, depending on issuer)
- FX spread (the bank's/card's margin on top of the rate)
- IOF (3.5% on the converted amount)
When a bank advertises "zero IOF", it eliminates item 3. Item 2 — where most of the money sits — stays untouched and is often larger precisely on products that zero the IOF, because the bank needs to recover margin.
That's the trick. And that's why the effective rate per USD 100 is the only number that matters.
3. The real math: USD 100 spent on each card
Base scenario: USD 100 international purchase, PTAX rate on the day BRL 5.50.
| Card | Annual fee | Estimated real spread | IOF | Cashback | Effective rate (BRL per USD 100) | Voyspark note |
|---|---|---|---|---|---|---|
| Wise debit | BRL 0 | ~0.7% | 3.5% | 0% | BRL 573 | Unbeatable at low/mid volume |
| Nomad debit | BRL 0 | ~0.8% | 3.5% | 0% | BRL 574 | Technical tie with Wise |
| BTG Cashback IOF Zero | BRL 0 (Single+) | ~1.5% | 0% | 0.5% | BRL 555 | Best of the no-IOF category |
| Nubank Ultravioleta | BRL 0 (with spend) | ~2.0% | 3.5% | 1% | BRL 565 | Cashback masks spread |
| Sicredi IOF Zero promo | BRL 0 (member) | ~2.0% | 0% | 0% | BRL 561 | Good through Dec 2026 |
| Banco Inter Black | BRL 0 | ~2.3% | 3.5% | 0.3% | BRL 568 | Partial cashback doesn't save it |
| Itaú Click | BRL 0 (eligible) | ~2.5% | 3.5% | 0.5% | BRL 570 | Mediocre |
| Average traditional card | BRL 400-1200 | ~4.0% | 3.5% | 0% | BRL 590 | Worst case |
Notes on the table:
- The real spread is estimated from the difference between PTAX and the rate charged on the statement. It is not officially disclosed. Estimates come from comparing Voyspark reader statements and public network tracking in May 2026.
- Wise is still ahead at USD 100 by a margin of BRL 2 to BRL 18 (~USD 0.30 to USD 3). At low values, that's effectively noise.
- BTG IOF Zero beats all other no-IOF options — including Wise — when monthly volume is high.
4. When the no-IOF card actually wins
There is an inflection point. For large purchases — above USD 3,000 per month — a no-IOF card with low spread starts beating Wise/Nomad.
Example: USD 5,000 spent on a trip or international purchase.
- Wise: USD 5,000 × 5.73 = BRL 28,650
- BTG Cashback IOF Zero: USD 5,000 × 5.55 = BRL 27,750
- Difference in favor of BTG: BRL 900 (~USD 160)
For this profile, the BTG no-IOF card makes a real difference. Nubank Ultravioleta, even with 1% cashback, lands at BRL 28,250 — losing to BTG by BRL 500 and beating Wise by BRL 400.
The takeaway: volume matters. Below USD 1,500/month, Wise/Nomad win on simplicity. Above USD 3,000/month, it's worth auditing no-IOF products — and BTG leads.
5. Dissecting Nubank Ultravioleta
Ultravioleta was repositioned as a "premium travel card" without being overhauled behind the scenes. What changed was the messaging: "1% cashback neutralizes IOF".
Mathematically:
- 3.5% IOF on USD 100 = BRL 19.25 in tax
- 1% cashback on USD 100 = BRL 5.50 returned
- Net: cashback offsets only 28% of the IOF, not 100%.
Add the 1.5% to 2.5% spread that Nubank charges on international purchases (varying by BIN and brand) and the product lands at an effective rate of BRL 565 per USD 100 — worse than Wise, worse than BTG, better than a traditional card.
Worth it for: existing Nubank clients with active Ultravioleta, high monthly volume and a preference for a single statement. Doesn't justify the fee or the effort of switching accounts.
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6. BTG Cashback IOF Zero: the serious product of the wave
Here the product does what it promises. The IOF waiver is real and not conditional on cashback. BTG's FX spread sat between 1.3% and 1.7% in May 2026 statement tests, placing the card at the lowest effective rate in the market for international credit purchases.
Limitation: the card is issued to Single-tier clients (BRL 25k/month income or BRL 250k in investments) and above. For retail, BTG keeps the standard Mastercard model.
For eligible clients, it's the card with the best math in the category.
7. Sicredi promotional zero IOF
Valid through December 2026 for eligible co-op members. Genuine zero IOF, average spread around 2%. Effective rate per USD 100 lands at BRL 561, slightly behind BTG.
Double limitation: you need to be a Sicredi co-op member (impossible in several Brazilian states without local branches) and the promotion has an expiration date. In January 2027, IOF goes back to normal.
Worth it for existing co-op members with recurring foreign-currency spending in the next seven months.
8. Banco Inter, Itaú Click and the rest
These products exploit the "hassle-free FX" tag without actually zeroing IOF. Partial cashback (0.3% to 0.5%) on international purchases reduces but doesn't eliminate total cost. FX spread between 2.3% and 2.5% leaves the effective rate at BRL 568 to BRL 570 per USD 100 — worse than Wise.
Defensible products for existing clients who don't want an additional card. Don't justify changing primary bank.
9. Direct comparison: no-IOF card vs. Wise/Nomad
To put the discussion at human scale, purchases from USD 100 to USD 5,000:
| Volume | Wise (BRL) | Nubank Ultravioleta (BRL) | BTG IOF Zero (BRL) | Winner |
|---|---|---|---|---|
| USD 100 | 573 | 565 | 555 | BTG |
| USD 500 | 2,865 | 2,825 | 2,775 | BTG |
| USD 1,500 | 8,595 | 8,475 | 8,325 | BTG |
| USD 3,000 | 17,190 | 16,950 | 16,650 | BTG |
| USD 5,000 | 28,650 | 28,250 | 27,750 | BTG |
When BTG is eligible, it wins across all tiers. When it isn't, Wise beats Nubank Ultravioleta at retail and ties at mid volumes. Wise only loses to Nubank when the user values a single statement and revolving credit — real benefits, but not FX.
10. Common mistakes choosing a "no-IOF" card
Mistake 1: thinking zero IOF means unbeatable rate. Rate is IOF + spread. High spread eats the savings.
Mistake 2: ignoring FX spread. Spread doesn't show up in marketing. It shows up on the statement. Compare the charged rate to the day's PTAX.
Mistake 3: confusing partial cashback with zero IOF. 1% cashback on the purchase value isn't equivalent to a 1% IOF reduction. Run the math in BRL.
Mistake 4: switching primary bank for the card. Savings rarely offset the operational friction of moving checking accounts.
Mistake 5: ignoring volume. No-IOF cards shine at high volumes. At small purchases, the edge disappears.
11. The Voyspark practical path
- One-off purchase up to USD 500: Wise or Nomad debit. Simple, transparent, low cost.
- Recurring monthly spend of USD 500 to USD 1,500: Wise debit still wins. No-IOF cards don't justify the friction.
- Monthly spend of USD 1,500 to USD 3,000: BTG Cashback IOF Zero, if eligible. Otherwise, Wise.
- Monthly spend above USD 3,000: BTG IOF Zero dominates. Second place, Sicredi promotional (if member).
- Large one-off trips: BTG or Sicredi if applicable; Wise as backup.
- Existing Nubank client with Ultravioleta: keep it, but don't move accounts just for the card.
12. What's next (and how to read the ads)
The "no IOF" wave should grow in the second half. Smaller digital banks will copy BTG and Nubank. The questions to ask on every launch:
- What's the product's real FX spread?
- Does the zero IOF have an expiration date or condition?
- What's the effective rate per USD 100 compared to Wise?
- Are there annual fees, monthly fees, or relationship requirements?
If the ad doesn't answer all four, the product is probably masking a high spread with cheap marketing.
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Curadoria Voyspark
2 anos no editorial Voyspark
Time editorial da Voyspark — escritores, repórteres, fotógrafos e fixers em Lisboa, Tóquio, Nova York, Cidade do México e Marrakech. Coletivo. Sem voz corporativa. Cada peça com checagem cruzada por um editor regional e um chef ou curador local.
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