First-Time Home Buyer Guide: What No One Tells You Before You Start
First-time buyers face four sequential decisions: how much you can borrow (DTI under 43%), how much to put down (3–20%), which loan type fits (FHA vs conventional), and what the all-in monthly cost actually is. This guide walks through each with real numbers.
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First-time home buyers face four sequential decisions before making an offer: how much you can borrow (DTI under 43%, credit score 620+), how much to put down (3–20%), which loan type fits your situation (FHA vs conventional vs VA), and what the all-in monthly cost will be — not just principal and interest, but taxes, insurance, HOA, and maintenance. Most first-time buyers underestimate the last two by 30–40%, which is why home affordability calculators that only show mortgage payments mislead.
The home buying process overview
The Home Buying Process
Check finances
- Credit score 620+
- DTI under 43%
- 3–20% down saved
Get pre-approved
- Shop 3+ lenders
- Lock rate within 45 days
Search & offer
- Work with a buyer's agent
- Earnest money 1–3%
Under contract
- Inspection period 7–14 days
- Appraisal ordered by lender
Closing
- Cash to close ready
- Sign ~100 pages of documents
Decision 1: How much can you actually borrow?
Lenders use two ratios to determine maximum loan size:
- Front-end DTI (housing ratio): Proposed PITI (principal, interest, taxes, insurance) ÷ gross monthly income. Maximum: typically 28%.
- Back-end DTI (total debt ratio): All monthly debt payments (PITI + car loans + student loans + credit card minimums) ÷ gross monthly income. Maximum: typically 43% for conventional; up to 57% for FHA in some cases.
Example: $80,000 gross annual income ($6,667/month). At 28% front-end: maximum housing payment of $1,867/month. At 7% interest, 30-year term, with taxes and insurance, that supports a loan of approximately $250,000. With a 10% down payment: home price of approximately $278,000.
| Annual income | Max housing payment (28%) | Approx. loan at 7% | Home price (10% down) |
|---|---|---|---|
| $60,000 | $1,400/mo | ~$185,000 | ~$206,000 |
| $80,000 | $1,867/mo | ~$250,000 | ~$278,000 |
| $100,000 | $2,333/mo | ~$315,000 | ~$350,000 |
| $150,000 | $3,500/mo | ~$470,000 | ~$522,000 |
Decision 2: How much down payment do you need?
You do not need 20% down. Here are all the options:
| Loan type | Minimum down | Credit required | Mortgage insurance |
|---|---|---|---|
| Conventional (Fannie/Freddie) | 3% | 620+ | PMI until 20% equity; cancellable |
| FHA | 3.5% | 580+ | MIP for life of loan (must refinance to remove) |
| VA (veterans) | 0% | No official minimum | No PMI (VA funding fee instead) |
| USDA (rural areas) | 0% | 640+ | Guarantee fee + annual fee (lower than FHA) |
| Conventional (20% down) | 20% | 620+ | None |
On a $350,000 home: 3% down is $10,500; 3.5% (FHA) is $12,250; 20% is $70,000. Lower down payments get you into a home faster but cost more monthly (PMI/MIP) and more in total interest (larger loan). The right answer depends on your credit, the local market, and whether alternative uses of your cash (investing) outperform the PMI savings.
Decision 3: FHA vs conventional — which loan?
The rule of thumb:
- Credit score below 680: FHA is usually better — easier qualification, more flexible DTI
- Credit score 680+ with 5%+ down: Conventional is usually cheaper long-term — PMI cancels at 20% equity, vs FHA's lifetime MIP
- Military or veteran: VA loan is almost always superior — no PMI, no down payment, competitive rates
- Rural area: Check USDA eligibility — no down payment required, lower mortgage insurance than FHA
Decision 4: The true all-in monthly cost
The mortgage payment is only part of what owning a home costs monthly. The full picture (on a $350,000 home with 10% down at 7%):
| Cost component | Estimated monthly | Notes |
|---|---|---|
| Principal + interest (7%, 30yr, $315k loan) | $2,096 | Fixed for life of loan |
| Property taxes (1.1% avg) | $321 | Varies 0.3%–2.5% by location |
| Homeowner's insurance | $150 | Typically $1,200–$2,500/year |
| PMI (at 10% down, conventional) | $175 | Cancels at 20% equity; ~0.5–1% annually |
| HOA (if applicable) | $0–$400 | Condos/townhomes often $200–$600/mo |
| Maintenance reserve (1% of home/year) | $292 | Budget 1–2% of home value per year |
| Total all-in estimate | $3,034+ | vs $2,096 mortgage-only figure |
The all-in cost is 45% higher than the mortgage-only figure. This is the number you should qualify against your income, not just the principal and interest payment.
First-time buyer programs and assistance
Every state has a housing finance agency offering first-time buyer assistance:
- Down payment assistance grants: Free money (not repaid) ranging from $2,500 to $25,000 depending on state and income
- Low-interest second mortgages: Deferred repayment until you sell or refinance
- Mortgage credit certificates (MCCs): Tax credits of 20–25% of annual mortgage interest
- Fannie Mae HomeReady / Freddie Mac Home Possible: 3% down, lower PMI, flexible income counting (include roommate income)
- HUD Good Neighbor Next Door: 50% discount on home price for teachers, firefighters, police officers, and EMTs in designated areas
Search "[your state] housing finance agency first time home buyer" to find your state's specific programs. Income limits apply but are often higher than people expect — many programs cover median-income households.
What to negotiate beyond price
First-time buyers often focus only on purchase price. These items are equally or more negotiable in a buyer's market:
- Seller concessions: Ask the seller to pay 2–3% of purchase price toward your closing costs — on $350,000 that is $7,000–$10,500, often more impactful than a $5,000 price reduction
- Inspection repairs: After inspection, request credits for deficiencies rather than repairs — you control how the money is spent
- Closing date flexibility: Sellers often value timing over price — a flexible closing date can make your offer more competitive without raising your price
- Home warranty: Ask the seller to provide a 1-year home warranty covering appliances and systems (typically $400–$700)
Key takeaways
- You do not need 20% down — conventional loans start at 3%, FHA at 3.5%, VA and USDA at 0%.
- The all-in monthly cost (taxes, insurance, PMI, maintenance) is typically 40–50% higher than the mortgage payment alone — budget against the full number.
- FHA is better for scores below 680; conventional is cheaper long-term for scores above 680 with 5%+ down because PMI cancels at 20% equity.
- Check your state's housing finance agency for down payment grants and below-market rate programs — income limits are often higher than people expect.
- Seller concessions (seller pays your closing costs) are often more impactful than negotiating a lower price.
Frequently asked questions
How much do first-time home buyers need to put down?
As little as 3% on conventional (HomeReady/Home Possible), 3.5% on FHA, 0% on VA (veterans) and USDA (rural). On a $350,000 home: 3% = $10,500; 3.5% = $12,250; 20% = $70,000.
What credit score is needed for a first-time home buyer?
FHA accepts 580+ (with 3.5% down) or 500–579 (with 10% down). Conventional requires 620+. Best rates require 740+. For scores 620–679, FHA often has lower total cost; above 680 with 5%+ down, conventional is usually cheaper.
Are there first-time home buyer grants or programs?
Yes — every state has a housing finance agency with down payment assistance grants, low-interest second mortgages, and below-market first mortgage rates. Search "[state] housing finance agency first time home buyer." Federal programs include HomeReady, Home Possible, and HUD Good Neighbor Next Door (50% discount for teachers, firefighters, police, EMTs).
How long does it take to buy a house as a first-time buyer?
3–6 months from serious search to closing. Pre-approval: 1–5 days. Home search: 1–6 months. Under contract to closing: 30–60 days. Plan for 3 months minimum, 6 months for a comfortable timeline.
What should first-time buyers know about closing costs?
Closing costs run 2–5% of the loan amount ($6,000–$15,000 on a $300,000 mortgage), separate from the down payment. Ask for seller concessions — sellers can credit buyers up to 3–9% of purchase price toward closing costs depending on loan type and LTV.
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