CD Ladder vs. Treasury Ladder: Choosing a Smart Cash Strategy

Many large banks offer certificate of deposit (CD) ladders as a straightforward place to park cash. Programs like this can assist financial institutions in managing client assets, and CDs can be considered as a short-term investment option. 

CDs can absolutely play a role in a cash management strategy. But they aren’t always the most tax-efficient or flexible option, and they may not offer the best yields once you look at the full picture.

Two CD ladder alternatives are the treasury ladder strategy and institutional money market strategy. They can offer higher yields than CD ladders, better tax treatment, and improved liquidity. The liquidity feature is especially beneficial if you want to keep cash accessible without sacrificing return potential. You should take all of this into consideration as part of your overall fixed income allocation. 

In this article, we explain the main differences between these accounts to help you see which option may be right for your goals and financial plan. 

What is a CD ladder? 

A CD ladder splits your cash across multiple CDs with different maturities (for example: 3, 6, 9, and 12 months). As each CD matures, you either withdraw your money or roll it into the longest rung on the ladder. The concept is to reduce reinvestment risk, increase access at periodic intervals, and capture slightly higher rates for longer terms. 

Pros 

• FDIC insurance up to applicable limits (typically $250,000 per depositor) per issuing bank 

• Predictable rates and maturity dates 

• Simple structure that’s easy to understand 

Cons 

• Liquidity penalties: Early withdrawals usually trigger penalties and may forfeit interest. 

• Tax treatment: CD interest is taxed as ordinary income and is subject to both federal and state or local taxes. 

• Rate friction: You’re locked into the CD’s rate until maturity, which can be a disadvantage if rates rise. 

• Operational constraints: Moving cash between CDs or banks can be cumbersome; rates vary widely by institution and term. 

What is a Treasury ladder? 

A Treasury bills (T-bills) ladder uses U.S. Treasury bills or notes with staggered maturities (for example: 3 to 12 months). Treasuries are supported by the full trust and credit of the U.S. government. They trade in financial markets that have high liquidity and depth (large volumes of buy and sell orders at different price levels.) 

Key advantages 

• Tax efficiency: Interest on Treasuries is not taxed by state and local governments. This boosts the after-tax yield, which is helpful in states with high taxes. 

• Liquidity: Treasuries can be sold prior to maturity in most market conditions without “penalties.” Pricing will reflect current rates, but you retain flexibility to raise cash when needed. 

• Competitive yields: Short-term Treasuries often match or exceed CD rates, especially in rate environments where T-bill yields are elevated. 

• Operational ease: Implementation is streamlined; proceeds from maturities can be reinvested or redeployed according to your plan. 

Potential disadvantages 

• Less feeling of reassurance without FDIC insurance 

• No fixed interest rate stability 

• Higher rate than a bank’s promotions for CDs 

• More steps to access your money than with a no-penalty CD (rare but offered by some banks) 

Money market funds: A flexible option 

Institutional money market funds invest in short-term, high-quality assets, including Treasuries and government securities. They aim to keep a stable net asset value. 

Benefits 

• Daily liquidity: Easy access for near-term expenses and opportunistic cash needs. 

• Competitive rates: Yields float with current short-term markets and can be compelling when policy rates are high. 

• Diversification: Exposure across many issuers and instruments, with strict quality and maturity requirements. 

Money markets can be the base of a ladder strategy. They act as your “cash hub.” Treasuries offer scheduled maturities to help you replenish or extend the ladder. When considering a money market vs. CD ladder, think about the options for a Treasury plus money market approach. 

Pros and cons of liquidity, protection, and tax treatment 

Here are pros and cons of three key features of the investment options: 

Feature	Bank CD Ladder	Treasury Ladder	Institutional Money Market
Liquidity	Pro: Offer predictable access to cash at scheduled intervals as each rung matures.	Pro: Can be sold in deep, liquid markets before maturity, usually without penalties, providing flexibility if you need cash quickly.	Pro: Offer same-day liquidity in most cases, ideal for operating cash or immediate needs.
	Con: If you need funds before maturity, early withdrawal penalties often apply, and you may lose accrued interest. This can make CDs less flexible for unexpected needs.	Con: The price you receive may fluctuate with interest rates, so there’s a small risk you could get less than face value if rates have risen.	Con: Yields can fluctuate and, while funds aim to maintain a stable value, they are not guaranteed by the government.
Protection	Pro: Insured by the FDIC up to $250,000 per depositor, per bank, offering protection against bank failure.	Pro: Backed by the full faith and credit of the U.S. government, generally considered a safe investment option globally.	Pro: Invest in high-quality, short-term securities, often government-focused, offering a high degree of safety.
	Con: Protection is limited to the FDIC coverage amount, so large balances may require spreading funds across multiple banks.	Con: Not FDIC-insured, which may feel less reassuring, though the risk of default is low.	Con: Not insured by the FDIC or the government, though strict regulations help maintain stability.
Tax treatment	Con: Interest earned is taxed as ordinary income at both federal and state or local levels, which can reduce your after-tax yield, especially in high-tax states.	Pro: Interest is exempt from state and local taxes, boosting your after-tax yield. This is particularly advantageous for investors in states with higher income taxes.	Pro or Con: Tax treatment depends on the fund’s holdings. Treasury-focused funds may offer partial state tax benefits, while others are generally taxable at federal and state levels.

Comparing additional features 

Here’s how these options stack up across additional features: 

Feature	Bank CD Ladder	Treasury Ladder	Institutional Money Market
Yield	Fixed; varies by bank and term	Market-driven; often competitive or higher	Market-driven; typically competitive
Flexibility	Limited until maturity	High; reinvest or reallocate as needs change	Very high; suitable for operating cash
Operational complexity	Bank-specific terms; rate shopping can be manual	Straightforward to build and rebalance	Simple; acts as a cash anchor

Exploring the main differences 

CDs are widely marketed as safe, and their simplicity is a genuine advantage. But the after-tax, after-liquidity return story is what really matters.  

When you compare a CD that’s taxed at both federal and state levels with a Treasury whose interest is state-tax exempt, the difference can be material — particularly if you are in higher-tax states or with sizable cash balances. Add the ability to sell Treasuries in the secondary market (versus paying penalties to break a CD), and the flexibility benefit becomes even more compelling. 

Determining the right fit 

If these factors matter for your personal financial goals, you might consider Treasuries and institutional money markets over bank CDs: 

• State tax savings on interest income 

• Liquidity without being subject to early withdrawal penalties 

• Market-competitive yields with government backing 

• A dynamic cash solution that can adapt to rate changes, tax planning windows, and spending needs 

Understanding how banks are paid 

Banks and bankers are typically compensated based on the amount of client deposits they retain. This can create an incentive to keep your money in the bank, often by promoting products like CDs.  

In contrast, registered investment advisors (RIAs) such as Mercer Advisors are held to a higher fiduciary standard. RIAs are legally and ethically required to act in your best interest, recommending strategies that align with your financial goals, tax situation, and flexibility needs — rather than simply retaining your assets.  

Taking action 

If you’re currently using bank CDs for cash management — or considering a ladder — Mercer Advisors can run a side-by-side, after-tax comparison. We’ll show you how a tailored Treasury ladder and money market solution might enhance yield, improve tax efficiency, and increase flexibility without compromising safety. 

As part of your comprehensive wealth management solution, we can build Treasury ladders and integrate institutional money markets tailored to your cash needs, tax situation, and time horizon. We offer: 

• Design and execution: Ladder length, rung spacing, and reinvestment policy 

• Tax-aware optimization: Emphasis on state-tax-exempt income where appropriate 

• Liquidity planning: Align maturities with spending and investment timelines 

• Monitoring and rebalancing: Adjust as rates, markets, and your goals evolve 

If you want to discuss tax-efficient cash management, contact your Mercer Advisors wealth advisor. 

Not a Mercer Advisors client but looking for guidance on short- or long-term investment strategies and integrated tax optimization strategies? Let’s talk.