Tesouro Selic or CDB with Daily Liquidity: How to Compare for Your Emergency Fund

If you’re deciding where to keep your emergency fund, the comparison between Tesouro Selic and a CDB with daily liquidity should prioritize real liquidity, credit risk and costs. In short: both can serve as an emergency fund, but they have important differences in guarantees, how they’re marked to market, and redemption conditions that affect safety and convenience.

Below I explain step by step how to compare each aspect — without recommending any specific institution or product — and provide a checklist and a comparison table to help your decision. The information is general; for personalized recommendations, consider consulting an advisor or financial planner.

Table of Contents

Practical steps to compare Tesouro Selic and a daily-liquidity CDB

Confirm effective liquidity: check whether the product truly redeems in D+0 (funds available the same day) or D+1. Some banks advertise daily liquidity, but availability for withdrawal may occur on the next business day or require an internal transfer.
Check the guarantee: Tesouro Selic is guaranteed by the National Treasury; a CDB depends on the issuer’s solidity and, up to certain limits, the coverage of the Fundo Garantidor de Créditos (FGC). Consult the FGC’s official page to understand current limits and rules.
Assess credit risk: for CDBs, review the issuer’s ratings and financial statements; for government bonds, the risk is sovereign in nature. Avoid concentrating your entire emergency fund with a single issuer.
Consider marking to market: Tesouro Selic is subject to marking to market if sold before maturity, which can cause a small loss in specific moments; CDBs with daily liquidity generally offer an agreed redemption value, but contractual conditions may vary.
Compare costs and taxes: both are subject to Income Tax and possibly IOF on very short-term redemptions; custody fees, brokerage or bank charges can reduce net return. Check official pages for up-to-date rules.
Test the operation: open an account at a broker or bank and simulate investing and redeeming. Use the Tesouro Direto yield simulator to check practical examples.

Quick checklist before investing

Item	Question
Liquidity	Redemption in D+0 or D+1? Are there cutoff times?
Guarantee	Is it a public bond or covered by the FGC up to the official limit?
Costs	Are there custody, maintenance or brokerage fees?
Taxation	How do IR/IOF apply in your case?
Convenience	Can you redeem easily and transfer the money to your checking account?

Comparison table — key points

Characteristic	Tesouro Selic	CDB with daily liquidity
Liquidity	Can be redeemed before maturity; availability depends on the sale process and bank transfer	Claimed daily liquidity can mean immediate redemption or the next business day, depending on the contract
Credit risk	Sovereign risk (National Treasury)	Issuer risk; FGC coverage applies up to official limits (see source)
Guarantee	Guaranteed by the Treasury	FGC coverage within applicable limits; amounts above the limit are exposed to the issuer
Marking to market	Exists and can affect the value if sold in adverse conditions	Generally redeemed at the agreed value, but read the contract
Costs	There may be a custody fee (check Tesouro Direto and your broker)	Bank fees may apply; compare gross and net offers
Taxation	Subject to IR and IOF according to current rules	Subject to IR and IOF according to current rules

Common mistakes when choosing

Assuming “daily liquidity” is always instantaneous — confirm cutoffs and settlement times.
Failing to consider FGC coverage or misunderstanding the protection limit.
Ignoring fees and charges that reduce net return.
Concentrating the entire emergency fund with a single issuer without exploring alternatives.

Main limits and risks

Market risk: early sales of Tesouro Selic can be subject to marking to market and reflect price fluctuations. Credit risk: CDBs expose you to the issuer; protection from the

Frequently asked questions

Q: Can I lose money keeping my emergency fund in Tesouro Selic?
A: If you sell before the intended horizon during a period of strong volatility, marking to market can cause value variation. For short-horizon emergency investments, check the sale procedure and timing.

Q: Does the FGC guarantee any CDB with daily liquidity?
A: The FGC covers deposits and certain investments up to official limits and conditions; check the FGC page for up-to-date rules: