CD Ladder vs High-Yield Savings: October Math

The rates on the table this October

Every time rates move, I face the same question: lock in a CD rate, or stay flexible in a high-yield savings account? October 2026 makes it real — the Federal Reserve raised rates by 25 basis points in September, the first hike since 2023 according to the Wall Street Journal, and savings and CD rates are sitting in an unusually tight band.

Here is what WSJ Buyside listed on October 1, 2026. The best high-yield savings accounts pay up to 4.50% APY: GO2bank pays 4.50% on balances up to $5,000, and St. Mary's Credit Union pays 4.50% up to $50,000. Below those, Elevault pays 4.34% with no minimum, Pibank 4.25%, and Axos 4.21% with conditions. The best nationwide CD is Dakota Community Bank & Trust at 5.00% APY for 36 months with a $500 minimum. Tower Federal Credit Union pays 4.70% for 24 months, Educational Systems Federal Credit Union 4.55% for 18 months, and HAB Bank 4.50% for 3- and 6-month terms.

The comparison that matters most is not CD versus HYSA — it is either of those versus doing nothing. The FDIC national average savings rate is 0.38% (FDIC data cited by the WSJ on October 1), the FDIC average 12-month CD rate is 1.71%, and DepositAccounts.com puts the average among top CDs at 4.54%. If your money still sits in a default big-bank account, moving it is the decision.

Figure: October 1, 2026 APYs; earnings are simple APY math on $10,000 for one year, before taxes and penalties. Source: WSJ Buyside rates, Oct 1, 2026; FDIC average via WSJ; DepositAccounts.com top-CD average.

What $10,000 actually earns

Simple math on $10,000 (APY × $10,000, one year, before taxes): 5.00% → about $500; 4.50% HYSA → about $450; the 0.38% FDIC average → about $38.

So the honest headline: the best CD in the country beats the best savings account by roughly $50 per $10,000 per year, in exchange for giving up access for three years. Not life-changing. Leaving that $10,000 at 0.38% instead of 4.50%, though, costs about $412 a year. People agonize over the $50 decision and ignore the $412 one.

Two catches on the savings side. First, the top HYSA rates carry caps and conditions: GO2bank's 4.50% applies only to the first $5,000, and Axos's 4.21% has conditions attached. Second, savings rates are variable by design — after the Fed's September hike they could tick up in coming weeks, or fall next year while a CD stays locked. The CD's 5.00% is a 36-month guarantee; the HYSA's 4.50% is a snapshot.

The ladder I would build

For $10,000 I would not need for three years, here is exactly what I would do, using only the WSJ Buyside rates above:

1. Put $2,500 in the HAB Bank 6-month CD at 4.50% — the rung that matures, and can be re-locked, first.
2. Put $2,500 in the Educational Systems FCU 18-month CD at 4.55%.
3. Put $2,500 in the Tower FCU 24-month CD at 4.70%.
4. Put $2,500 in the Dakota Community Bank & Trust 36-month CD at 5.00%, which needs only a $500 minimum.

That ladder blends to roughly 4.69% APY across the $10,000 — (4.50 + 4.55 + 4.70 + 5.00) ÷ 4 — or about $469 in year one, versus $450 fully liquid. The extra $19 is not the point; the structure is. Something matures every 6–12 months; each maturity lets me re-lock at current rates, and if savings rates fall in 2027–28, most of the money is already locked above 4.50%.

Two notes: confirm credit-union membership eligibility (Tower, Educational Systems) before counting on those rates, and remember that early-withdrawal penalties vary by bank and can erase the whole rate advantage. The emergency fund stays in the HYSA — ladder only the money beyond it.

When I would stay liquid instead

I would skip the ladder and take the 4.50% HYSA if this is my emergency fund, if I expect a major expense within 18 months, or if I think the Fed is mid-hiking-cycle. September's hike was the first since 2023 — one hike is not a cycle — but if more follow, HYSA rates reset upward within weeks while a 36-month CD stays frozen at 5.00%. In a rising-rate stretch, liquidity wins, just with a delay.

My rule: money I will not touch for three years goes in the ladder, money I might touch stays in the HYSA, and nothing sits at 0.38%. The 5.00% vs. 4.50% gap is a judgment call. The 4.50% vs. 0.38% gap is just a leak.

FAQ

Is a 5.00% CD worth locking up money for three years? On $10,000, the Dakota 36-month CD at 5.00% earns about $500 a year versus about $450 in a 4.50% HYSA — roughly $50 more for giving up liquidity. Worth it for money you will not need; not worth it for an emergency fund.

What happens if rates rise again after I open a CD? Your rate is fixed until maturity — the trade-off. A ladder softens it: rungs mature every 6–12 months and can be reinvested at current rates, so only part of your money is ever stuck at an older rate.

How much am I losing in a regular savings account at 0.38%? About $38 a year on $10,000, versus about $450 at 4.50% — roughly $412 a year left on the table. Moving the account matters far more than the CD-versus-HYSA choice.

Do I pay taxes on CD and savings account interest? Yes. Interest from both is generally taxed as ordinary income in the year it is credited to you. Both rates here are quoted pre-tax, so the comparison holds either way — your actual keep depends on your bracket.

Are these accounts safe? Yes — at FDIC-insured banks and NCUA-insured credit unions, up to federal limits per depositor, per institution. I confirm the insurance status (and credit-union membership eligibility) before opening anything.