I’m Michael DiVita — DRE #01372066 | NMLS #241655, DiVita Home Finance (DRE #01818285 | NMLS #323700), Tiburon, CA. I’ve been in California mortgage lending since 2000 and founded DiVita Home Finance in 2007. I’m known as a creative mortgage broker: when a bank says no, I find the lender and the loan structure that can say yes. Call (800) 239-1103.
Debt-to-income ratio (DTI) is the number I spend the most time on with California buyers. In a market where the housing payment alone can push you to the limit before a single car payment is counted, the real work is finding the loan structure that fits your actual income and debts. Here’s how DTI is calculated, what each loan program allows, what counts and what doesn’t, and what to do when yours is too high.
How DTI Is Calculated
DTI is your monthly debt payments divided by your gross (pre-tax) monthly income. Lenders look at two versions:
- Front-end (housing) ratio = proposed housing payment ÷ gross monthly income. The housing payment includes principal, interest, property taxes, homeowners insurance, mortgage insurance, HOA dues, and — on leased land — ground rent.
- Back-end (total) ratio = proposed housing payment + all other monthly debt payments ÷ gross monthly income. This is the number most programs cap.
Example: a household earns $15,000 a month. Debts are a $450 car payment, a $300 student loan, and $100 in credit card minimums — $850 total. The proposed housing payment is $5,200. Front-end ratio: $5,200 ÷ $15,000 = 34.7%. Back-end ratio: ($5,200 + $850) ÷ $15,000 = 40.3%.
Quick DTI Calculator
Front-end: 34.7% | Back-end: 40.3%
Within typical limits for conventional, FHA, and many jumbo programs.
DTI Limits by Loan Type
| Loan type | Back-end DTI limit | Notes |
|---|---|---|
| Conventional (Fannie Mae) | Up to 50% with Desktop Underwriter approval; 36% manual, up to 45% with credit score and reserves | Higher ratios need a stronger overall file |
| FHA | Manual: 31/43, up to 40/50 with compensating factors (580+ credit); automated approvals can go higher | Below 580 credit, manual underwriting is capped at 31/43 |
| VA | 41% benchmark | Residual income often matters more; higher ratios are possible with strong residual income |
| Jumbo | Commonly 43%–45%; some lenders higher with strong reserves | Set by each lender |
| Non-QM (bank statement, asset-based) | Often up to about 50%, sometimes higher | Set by each lender; typically higher rates |
What Counts as Debt — and What Doesn't
Counted: the proposed housing payment; auto loans and leases; student loans; personal loans; minimum credit card payments; child support and alimony; payments on other real estate you own; and co-signed debts unless you can document someone else has been paying them.
Not counted: utilities, phone, groceries, gas, subscriptions, and retirement contributions. Your current rent also drops out when you're buying a home to replace the rental — lenders count only the new housing payment.
Details that trip people up:
- Student loans. Under Fannie Mae's rules, a documented $0 payment on an income-driven plan can be used. If a loan is deferred or in forbearance, the lender uses 1% of the balance or a fully amortizing payment. Other programs have their own formulas.
- Installment debts nearly paid off. Fannie Mae doesn't automatically count installment debts with 10 or fewer payments left, unless the payment significantly affects your ability to pay.
- New credit. A car or furniture loan opened during escrow can push you over the limit. Don't open new accounts until after closing.
DTI in High-Cost California Markets
In Marin, San Francisco, and the rest of the Bay Area, the housing payment alone often uses up most of the allowable DTI. A $1.6 million loan at an illustrative 7% rate on a 30-year fixed carries principal and interest of about $10,645 a month. For a household earning $250,000 a year ($20,833 a month), that's a 51% housing ratio before property taxes and insurance — beyond what most jumbo lenders will approve.
The fixes are structural: a larger down payment, a co-borrower, counting income that's been left out (RSUs, bonus, rental income), asset depletion for borrowers with significant investments, or a lower-payment structure such as an ARM or an interest-only jumbo. Each has trade-offs. This is where access to many lenders matters — what one declines, another may approve with the right structure.
How to Lower Your DTI Before You Apply
- Pay off, don't just pay down. Eliminating a small balance removes the whole payment from your DTI. I'll run the numbers first so you don't spend cash you need for closing or reserves.
- Document all your income. Bonus, overtime, commission, RSUs, and rental income can count with the right history — see RSU and equity compensation income.
- Add a co-borrower. A spouse or a non-occupant co-borrower can add qualifying income on programs that allow it.
- Change the structure. A larger down payment, a rate buydown, or a different program can lower the qualifying payment.
- Consider alternative-documentation loans. Self-employed borrowers whose tax returns understate cash flow may qualify on bank statements.
Frequently Asked Questions
What is the maximum DTI for a conventional loan?
Fannie Mae allows up to 50% with a Desktop Underwriter approval. For manually underwritten loans, the maximum is 36%, which can go up to 45% if you meet credit score and reserve requirements.
What is the maximum DTI for an FHA loan?
For manual underwriting, FHA's standard limits are 31% housing and 43% total. Borrowers with 580+ credit can go as high as 40/50 with compensating factors such as cash reserves or residual income. Automated approvals can exceed those ratios, but borrowers under 580 are capped at 31/43 when manually underwritten.
What is the maximum DTI for a California jumbo loan?
Most jumbo lenders cap total DTI around 43%–45%, and some go higher with strong credit, large reserves, and a bigger down payment. Non-QM jumbo programs may allow more at higher rates. The ceiling depends on the lender.
Does my current rent count in my DTI when I buy?
No, if the home you're buying replaces your rental. Lenders count only the proposed housing payment for the new home, not the rent you'll stop paying.
How are student loans counted if I'm on an income-driven plan or in deferment?
Under Fannie Mae's rules, a documented $0 income-driven payment can be used. For deferred or forbearance loans, the lender uses 1% of the balance or a fully amortizing payment. FHA and other programs use their own calculations.
How can I lower my DTI quickly?
Pay off smaller installment or credit card balances entirely, avoid new credit, and make sure all of your eligible income is documented. Adding a co-borrower or putting more down also helps. I'll model the options before you move any money.
Related Resources
- How Much House Can You Afford in California?
- High-DTI Mortgage Options
- Mortgage Pre-Approval Checklist
- Non-Occupant Co-Borrowers
- Jumbo Loans in California
- Mortgage Calculator
Official Sources & References
Talk to Michael Directly
DiVita Home Finance | Tiburon, CA | In lending since 2000, founded DiVita Home Finance in 2007. Michael DiVita DRE #01372066 | NMLS #241655. Company DRE #01818285 | NMLS #323700.
💬 Text: (310) 849-9124
