# Where to Keep Dollars Earning Interest

> Compare ways to earn a return on dollars by access, liquidity, taxes and funding costs. See how US savings accounts, Treasuries, funds and Picnic differ.

Source: https://usepicnic.com/en/blog/where-to-keep-dollars-earning-interest · Published 2026-06-04 · Updated 2026-11-12

_Financial education · Picnic_

**The right place to keep dollars earning interest needs to do three things: generate a dollar-denominated return, let you access your money when needed and avoid using up much of the gain in funding costs and tax.** Not every option delivers all three. Choose around your goal, rather than an advertised rate alone.

First, distinguish [whether a dollar account earns interest](https://usepicnic.com/br/blog/conta-em-dolar-rende) from [the different ways to hold dollars](https://usepicnic.com/br/blog/melhores-formas-guardar-dolar-2026). This guide focuses on the practical decision: you have dollars, or plan to buy them, and want to know where to put them to work.

## Ask where you can earn and still access the money

Searching for the highest yield is a tempting starting point, but an incomplete one.

Low-risk dollar interest rates are influenced by US monetary policy. On November 12, 2026, the [Federal Reserve's published target range](https://www.federalreserve.gov/economy-at-a-glance-policy-rate.htm) was **3.75%–4.00%**. That is a policy rate, not a retail savings offer or a ceiling on every dollar investment. Actual yields differ by instrument, maturity, fees and risk. A substantially higher advertised return needs an explanation of the additional risks, not an assumption that it is equally safe.

Funding costs, access time and the nature of what you own can matter as much as yield. Two products displaying a similar rate can produce very different usable balances.

## Four tests for choosing where to hold dollars

1. **What do you actually own?** A dollar deposit, a Treasury, fund units and a backed digital-dollar asset are different legal and economic products. Currency exposure alone does not mean you have a spendable dollar balance.
2. **How liquid is it?** Can you withdraw today, or do settlement, market hours, withdrawal restrictions or early-exit costs apply? A reserve needs reliable access; a longer-term portfolio may tolerate delays.
3. **What is required to open and use it?** Check residency rules, identification, tax documentation, brokerage access and minimum balances.
4. **What are the funding costs and taxes?** [IOF](https://usepicnic.com/br/blog/o-que-e-iof), [exchange-rate margins](https://usepicnic.com/br/blog/spread-cambial), management fees, income tax and, for some Brazilian funds, periodic tax prepayments all affect the result.

Only part of this checklist concerns yield. The rest concerns whether the product can do the job you need.

## The main options and who they suit

### An interest-bearing US bank account

US savings accounts may pay interest on dollar deposits. Rates vary by bank and account; not every checking account earns a meaningful return.

Access can be the obstacle for someone living in Brazil. Banks set their own residency, address, identification and tax-number requirements; some accept nonresidents, while others do not. Do not assume every institution requires a US Social Security number or that opening remotely is always possible. The [FDIC's consumer guidance](https://www.fdic.gov/consumer-resource-center) is a useful starting point for understanding bank accounts and deposit protection.

Also check the cost of moving money into the account. Transfers can involve fixed fees, intermediary charges and a conversion margin; there is no universal US$20–50 fee.

**Best suited to:** someone who already has suitable US banking access or can meet a bank's requirements.

### US Treasury securities

[Treasury securities](https://www.treasurydirect.gov/marketable-securities/) pay in dollars and carry US government credit exposure. Bills, notes and bonds have different maturities and payment structures.

Access usually requires an eligible account or brokerage arrangement. Liquidity is not simply “low”: a broker may let you sell before maturity, but the market price can be above or below what you paid, and settlement and withdrawal take time. Holding to maturity and selling early are different decisions. Taxes also depend on your residence and the instrument.

**Best suited to:** a dollar investment portfolio with a defined horizon, rather than money needed instantly at a checkout.

### A Brazilian currency fund: exposure is not a spending balance

A currency fund can provide exposure to exchange-rate movements, but you hold fund units rather than dollars available for a purchase or transfer. Understand the [difference between buying dollars and investing](https://usepicnic.com/br/blog/comprar-dolar-ou-investir).

Check the fund documents for management fees, redemption periods and tax treatment. Depending on the fund's classification and applicable rules, Brazilian income tax, potentially under a regressive holding-period schedule, and periodic prepayments known as _come-cotas_ may apply. Where applicable, those prepayments occur on the last business days of May and November; check the specific fund classification. Do not assume all currency funds have identical tax rates or liquidity. The [Receita Federal](https://www.gov.br/receitafederal/pt-br/assuntos/meu-imposto-de-renda) provides the starting point for individual tax guidance.

**Best suited to:** someone seeking currency exposure inside an investment portfolio, without needing to spend the balance in dollars.

### An earning digital-dollar balance

[Digital dollars](https://usepicnic.com/br/blog/o-que-e-dolar-digital) are dollar-referenced digital assets. A backed asset is not the same thing as a US bank deposit, and a balance held without an earning product does not automatically generate a return.

At Picnic, eligible digital-dollar balances can be placed in **Caixinha Protegida**. The app shows the current return and lets you request a withdrawal for later use, including funding an existing card. It is not a Brazilian savings account, CDB or investment fund, and it has **no FGC deposit guarantee**. Returns are variable and there are market, provider and operational risks. Do not treat the advertised return or immediate access as guaranteed.

Picnic's own margin on Pix card funding is zero, but the provider cost is not: the [official fee table](https://usepicnic.com/en/help/articles/complete-picnic-fee-table) lists **0.3%–0.5% relative to the reference exchange rate** for that route. Other conversions have their own pricing; check the exact operation in the app rather than extending that rate to every digital-dollar purchase.

**Card availability:** new Picnic card orders are temporarily paused. There is no confirmed reopening date. The current card version works until December 20, 2026, at 23:59 UTC; continuing afterward requires the announced upgrade. The new version initially offers virtual cards, with no confirmed physical-card date. Existing cardholders should check upgrade instructions and trip timing. See the [official card-order notice](https://usepicnic.com/br/help/articles/novos-pedidos-cartao-picnic-temporariamente-pausados).

[Compare the available earning options and the full quote in Picnic.](https://usepicnic.com/en)

**Best suited to:** someone comfortable with digital-dollar product risks who wants earning and spending options within one platform, subject to the available features.

## Start with your objective

- **Emergency reserve:** accessibility and reliability matter more than a headline yield. A dollar reserve also fluctuates against expenses in reais; it is not automatically a substitute for immediately available BRL. See [an emergency reserve in dollars](https://usepicnic.com/br/blog/reserva-de-emergencia-em-dolar).
- **Diversifying away from the real:** currency exposure may help diversify, but the dollar can also fall against the real. Read [whether dollarizing assets makes sense](https://usepicnic.com/br/blog/vale-a-pena-dolarizar-patrimonio) and assess funding costs and risk.
- **Long-term investment:** Treasuries and dollar-denominated funds may fit a portfolio, with risks, maturity and taxation assessed separately from everyday cash.
- **Travel and spending:** you need a usable payment balance or time to sell and transfer investments beforehand. A fund unit or Treasury cannot itself pay a restaurant bill.

You can separate these goals. Money for near-term expenses need not sit in the same product as a long-term portfolio.

## Why funding costs can outweigh a small yield difference

Before comparing annual rates, work out how much actually reaches the product.

Traditional Brazilian foreign-exchange transactions can involve **3.5% IOF**, depending on the transaction category, under [Decree 12,499/2025](https://www.planalto.gov.br/ccivil_03/_ato2023-2026/2025/decreto/d12499.htm). Investment remittances and other categories can have different treatment. The provider may also apply an exchange margin. There is no single rate or spread for every route.

The regulatory position of digital-dollar transactions is different. [BCB Resolution 521/2025](https://www.bcb.gov.br/estabilidadefinanceira/exibenormativo?tipo=Resolu%C3%A7%C3%A3o%20BCB&numero=521) classified certain transactions involving fiat-referenced virtual assets as foreign exchange. That classification does not by itself establish a 3.5% IOF charge on transactions with cards in this digital-asset category; such a charge still depends on complementary regulation. Picnic currently applies no IOF to the described card route. Check the rules again before converting.

For a **hypothetical** R$10,000 operation, adding 3.5% IOF and a 3% exchange margin as a simplified comparison gives R$650 in costs. That is not a universal quote: providers can apply charges to different bases, so the executable net amount matters. At a hypothetical annual return of 3.5%–3.75%, recovering a 6.5% initial cost takes roughly two years before tax, compounding differences or exchange movements.

This does not mean the lowest entry fee always produces the best investment. Product risk, ongoing fees, taxes, liquidity and the holding period can outweigh a small saving at the start.

With Picnic, zero own margin is not zero total cost. Provider costs are included in the confirmation quote; savings products and conversion routes must be checked separately. [See the available options in the app.](https://usepicnic.com/en)

## Comparison: earning in dollars versus access

| Option                      | What you hold           | Access                                        | Entry requirements               | Direct spending?                                         |
| --------------------------- | ----------------------- | --------------------------------------------- | -------------------------------- | -------------------------------------------------------- |
| Interest-bearing US account | Bank deposit            | Depends on account and transfer rules         | Bank-specific eligibility        | If linked to suitable payment services                   |
| US Treasuries               | Government security     | Maturity or market sale and settlement        | Eligible account or broker       | Not directly                                             |
| Brazilian currency fund     | Fund units              | Fund-specific redemption period               | Eligible investment account      | No                                                       |
| Picnic earning product      | Digital-dollar exposure | Subject to product and operational conditions | App eligibility and verification | After withdrawal/funding, with an existing eligible card |

The last line describes Picnic, not every digital-dollar product. No option is best in every situation. A US account may fit someone already banking there; Treasuries may fit an investment horizon; a digital-dollar product brings a different combination of convenience and risk.

## Frequently asked questions

### Where can dollars earn while remaining available for card use?

At Picnic, Caixinha Protegida offers a variable return and a withdrawal route for later spending through an existing eligible card. Withdrawal, funding and operational conditions still apply. Not every digital-dollar product offers a card, and new Picnic card orders are currently paused.

### Where should an emergency dollar reserve go?

Look for reliable access, low costs and risks you understand. Match the reserve's currency to likely expenses; money needed immediately in reais may require a BRL reserve as well. Yield should not be the only criterion.

### Do I need a US bank account to earn a dollar return?

No. A US account is one route, but securities, funds and digital-dollar earning products are different alternatives. Each has its own eligibility, risk and tax treatment.

### Is there tax on dollars earning a return?

Funding and earnings are separate questions. Foreign-exchange IOF depends on the route and legal category. Earnings can also be taxable under the rules applicable to your residence, product and holding structure. Some Brazilian funds have _come-cotas_. Ask a qualified accountant about your own position; no-IOF funding does not make investment income tax-free.

## The practical decision

Choosing where to keep dollars earning interest is less about finding the largest number and more about combining a suitable asset, access when you need it and a reasonable full cost.

1. Define the objective before choosing the product.
2. Compare net funding costs, ongoing fees and taxes, not just yields.
3. For spending, check how the invested balance becomes a usable payment balance.

If you want a dollar reserve without opening a foreign bank account, compare digital-dollar options alongside their risks rather than treating them as identical to bank savings. Start with [how to buy dollars step by step](https://usepicnic.com/br/blog/como-comprar-dolar-passo-a-passo), then choose where the balance should sit.

[Check current quotes and earning conditions at Picnic.](https://usepicnic.com/en)

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_Picnic is a technology platform that lets users independently interact with USDC, a U.S. dollar-pegged stablecoin issued by Circle, on public blockchains. USDC is not legal tender in Brazil._

_Displayed exchange rates vary with market conditions. The final applicable amount is the one shown on the transaction confirmation screen. Cryptoassets involve risks, including volatility and loss of peg._

_Picnic does not custody user assets and is neither a financial institution nor a virtual asset service provider. Sending and receiving U.S. dollar payments through a U.S. account is offered in partnership with Noah Savings Inc. Terms and conditions apply._

_Information verified in November 2026._