Let me be clear up front: buying is not always the right answer in San Jose, and I would rather tell you to keep renting than put you in a house that stresses your family. Here is the honest comparison I do with clients.
Start with a real example
A 3-bedroom home in Blossom Valley rents for about $4,000/month. Buying a similar home at $1,350,000 with 20% down and a 6.5% rate means roughly $6,800 for principal and interest, plus about $1,500 for property tax and insurance — around $8,300/month. Renting looks far cheaper. That is where most people stop. Keep going.
What the monthly number hides
- Principal paydown: in year one about $1,100/month of that payment is going into your own equity, not to a landlord.
- Tax deduction: mortgage interest (on up to $750,000 of loan) and property tax (within the SALT cap) can lower your federal and California taxes. For many South Bay households that is worth several hundred dollars a month. Ask your CPA for your real number.
- Rent increases: rents in Santa Clara County have historically risen over time; your fixed-rate payment does not.
- Appreciation: nobody can promise it, but South Bay housing has appreciated meaningfully over most 7–10 year periods. I model 0%, 3% and 5% so you see the range, not a fantasy.
- Opportunity cost: your $270,000 down payment could be invested instead. Be fair and count that too.
The questions that actually decide it
- How long will you stay? Under 4–5 years, renting usually wins once you include buying and selling costs. Longer, buying usually wins.
- Is your income stable and are your reserves intact after closing? I want to see 6 months of expenses left over.
- Would the payment keep you from other goals — kids' college, helping parents, starting a business?
My rule of thumb
If you plan to stay 5+ years, the all-in payment is under about 35–40% of take-home pay, and you still have reserves, buying in San Jose has historically been the better financial move. If not, rent without guilt and let's build a plan to get there.
Want your own numbers instead of an example? Use my affordability tool, then send me the result and I will run the five-year comparison for you.
Tóm tắt tiếng Việt
Thuê hay mua nhà ở San Jose? Không phải lúc nào mua cũng đúng. Ví dụ: thuê nhà 3 phòng ngủ khoảng $4,000/tháng; mua căn tương tự $1.35 triệu, down 20%, lãi 6.5% thì trả khoảng $8,300/tháng gồm thuế và bảo hiểm.
Nhưng con số hàng tháng chưa kể: khoảng $1,100/tháng trả vào vốn của mình, khấu trừ thuế, tiền thuê tăng theo năm, nhà lên giá (Ken tính 0%, 3%, 5%), và tiền down nếu đem đầu tư chỗ khác.
Quy tắc của Ken: ở từ 5 năm trở lên, tiền nhà dưới 35–40% lương thực lãnh, và còn tiền dự phòng 6 tháng sau khi mua → mua thường lợi hơn. Không đủ thì cứ thuê, rồi lên kế hoạch với Ken. Liên lạc Ken.
