My partner and I want to buy our first h
For reference only. Not investment advice.
Question
My partner and I want to buy our first home in approximately 3 years. Based on homes in our target area (~$400K), we're aiming for a 20% down payment ($80K) to avoid PMI.
Our current situation:
- Combined take-home: $8,200/month
- We can realistically save $1,200/month toward the down payment
- We have $11,000 already saved in a regular savings account (0.5% APY — I know, embarrassing)
- No existing investment accounts dedicated to this goal
- We have a 3-year timeline: not long enough for a stock market approach (we're told), but too long to just sit in a regular savings account
We're confused about where to put this money. We've heard: HYSAs, CDs, Treasury bills, I-bonds, even a oth IA first-time buyer withdrawal. But we don't know how to evaluate these for a 3-year timeline.
Questions:
- For a 3-year timeline, what are the appropriate account types that balance growth vs. capital preservation (since we absolutely cannot afford to lose principal by the time we need it)?
- How does the math look on HYSA vs. short-term CD laddering vs. T-bills for $11K now + $1,200/month over 36 months?
- The oth IA first-time homebuyer exception ($10K lifetime) — is it worth opening a oth IA now and contributing, with the plan to use contributions (not earnings) for the down payment?
- What's the biggest mistake first-time buyers make when saving for a down payment that we should avoid?
Answer
At $1,200/month for 36 months on top of your $11,000, you reach $54,200 at zero yield. Verified by running `savings_goal.py` with goal=$54,200 / current=$11,000 / monthly=$1,200, which returned months=36 (last-month amount $1,200.00). That is $25,800 short of $80,000. Switching accounts does not close a contributions gap of that size; raising $1,200 or extending the timeline does.
Q2 — months to $80,000 (model, not a prediction):
| Annual rate (compounded monthly) | Months to $80K | Last-month amount | Source |
|---|---|---|---|
| 0.0% (zero-yield cash) | 58 | $600.00 | this turn's `savings_goal.py` |
| 0.5% (your current savings) | 57 | $731.58 | this turn's `savings_goal.py` |
| 4.5% (illustrative) | 51 | $581.03 | this turn's `savings_goal.py` |
| 5.0% (illustrative) | 50 | $1,103.88 | this turn's `savings_goal.py` |
You have not given me a quoted rate from a named HYSA, CD, T-bill, or I-bond product, and the four rows above are not endorsements — 4.5% and 5.0% are placeholders I picked to show that even a generous rate only buys back ~7 months against a 36-month plan. Send the rate the seller is quoting, in the seller's own period and the seller's own words, and I will re-run this table against it.
Q1 — what each vehicle actually trades off (no picking):
- HYSA. Insured cash (FDIC at banks, NCUA at credit unions, $250K depositor limit). Liquid, usually next-day. ate floats with the market.
- Short-term CD ladder. Insured cash. ate fixed at purchase; principal locked until maturity. Early withdrawal usually pays an interest haircut (often a few months of interest, depends on the term). Laddering 3/6/9/12 months keeps cash accessible as each rung matures.
- T-bills. US Treasury direct obligation (not FDIC-insured). Sold at discount or with a stated yield at auction. Liquid in the secondary market but the price moves if you sell before maturity.
- I-bonds. US Treasury savings bond. ate is a fixed component plus a semi-annual inflation adjustment. Locked for the first 12 months; redemption before 5 years loses the most recent 3 months of interest. Annual purchase cap is set by TreasuryDirect — confirm the current figure on TreasuryDirect's own page before counting on it.
For any specific candidate, run these six checks before funding it. I will not pick for you, and I will not name a substitute.
- Licence + register. Which regulator lists this seller? (US lookup: SEC, CFPB, plus the relevant banking or insurance register.)
- Legal promisor. Whose name is on the contract — not the friend's, not the influencer's?
- Contract wording. What does it actually say about principal, yield, and conditions, quoted word for word?
- Liquidity / redemption. When can you get the money out, with what notice, and what is the haircut?
- If the seller is gone. Is your money segregated, insured, or held in a custodian account?
- isk disclosure. Is the risk language in the same document as the yield claim?
Q3 — oth IA first-time homebuyer exception:
This pack carries no IS row for US tax rules (the US card is SEC / CFPB for credit/securities, source https://www.sec.gov/, accessed 2026-09-02), so I will not quote the statute. The shape, as you described it, is that a first-time homebuyer can withdraw up to $10,000 of oth IA contributions (not earnings) lifetime for a qualified home purchase without the 10% early-withdrawal penalty. The income limits, the 5-year account-age rule, the qualified-use window, and the tax treatment of any earnings withdrawn are all conditions — verify each one against IS Publication 590-B (the IS's own page is the source, not me) before relying on it. Even on the friendliest reading, $10,000 of contributions does not move the $25,800 gap. As a retirement vehicle it has its own logic; as a down-payment source it is small.
Q4 — what tends to go wrong for first-time savers:
- Stopping at the down-payment figure and leaving nothing for closing costs, inspections, appraisal, lender fees, and moving. Whatever number you settle on, pad it before you stop saving.
- Treating the down-payment fund and the emergency fund as the same pot. Lenders want one untouched; life wants the other.
- Pulling from a retirement account before you have priced the full bill. The 10% penalty is the visible cost; the lost years of tax-advantaged growth are usually the larger one.
- Letting yield-shopping delay the contribution. A rate you can verify today, at a seller you can name, on a deposit insured to the cap, beats a higher rate a year from now.
Pick the account yourself; you live with the choice. Send me the seller's quoted rate and I will re-run the months-to-goal against it.