The Moment
You have cash to park — emergency fund, short-term savings, or a holding account while you plan your next move. Both high-yield savings accounts and money market funds offer 4-5% yields. Which is better?
For most people, the answer is simpler than the internet makes it.
The Comparison
High-Yield Savings Account (HYSA) - Yield: 4.0-5.0% APY (as of 2025-2026) - Insurance: FDIC-insured up to $250,000 per depositor, per bank - Liquidity: Immediate access via transfer or debit card - Tax treatment: Interest taxed as ordinary income - Best for: Emergency fund, short-term savings, down payment fund
Money Market Fund (at a brokerage) - Yield: 4.5-5.2% — often slightly higher than HYSA - Insurance: Not FDIC-insured (but government money market funds hold Treasury securities) - Liquidity: Same-day or next-day settlement - Tax treatment: Interest taxed as ordinary income (or tax-exempt for municipal money market funds) - Best for: Cash above emergency fund threshold, brokerage cash sweep
The practical difference is 0.2-0.5% in yield. On $20,000, that is $40-$100/year. This is not worth agonizing over.
The Simple Decision
Emergency fund → HYSA. FDIC insurance and instant access are non-negotiable for money you need in a crisis. The slightly lower yield is the cost of insurance and liquidity — and it is a bargain.
Cash above emergency fund → Either is fine. If you have $50,000+ in cash beyond your emergency fund (waiting to invest, saving for a down payment, etc.), a government money market fund at your brokerage offers a small yield advantage. The lack of FDIC insurance is mitigated by the fact that government money market funds hold Treasury securities (backed by the US government).
Do not overthink this. The difference between 4.3% and 4.8% on $30,000 is $150/year. Spend 5 minutes choosing, not 5 hours.
Run Your Numbers
See how your cash grows in a HYSA over time.
Emergency Fund Builder
What to explore next
- →Should I build a T-bill ladder for higher yield?
- →How much cash should I keep outside of investments?
- →Where should I keep my down payment savings?
Frequently Asked Questions
Are money market funds safe?
Government money market funds (which hold Treasury bills and government securities) are extremely safe — they have never lost money in modern history. Prime money market funds (which hold corporate debt) carry slightly more risk — one famously 'broke the buck' in 2008. For safety, use a government money market fund.
Which HYSAs have the best rates?
Online-only banks consistently offer the highest HYSA rates because they have lower overhead than brick-and-mortar banks. As of 2025-2026, popular high-yield options include Marcus (Goldman Sachs), Ally, Capital One 360, and Discover. Rates change frequently — check current rates before opening.