The Five Numbers That Decide Your Loan
When you apply for a mortgage, auto loan, or personal line of credit, the lender runs your financial profile through a standardized risk model. That model crunches five main inputs: your credit score, debt to income ratio, liquid assets, employment stability, and the loan to value ratio. Each gets a weight. None is optional.
Credit Score: The First Cut
Your FICO score is the gatekeeper. A 760 or higher gets you the best advertised rates. Below 680 you start paying a penalty. Below 620 many conventional lenders walk away. The score itself is built from payment history (35%), credit utilization (30%), length of history (15%), new inquiries (10%), and credit mix (10%). Miss a payment and that 35% slice drops hard. Max out a card and the 30% slice signals you are stretched.
The key risk: a single missed cable bill that went to collections can shave 80 points. Pull your credit file from annualcreditreport.com at least six months before applying so you have time to dispute errors.
Debt to Income Ratio: The Hard Ceiling
Lenders calculate your front‑end DTI (housing costs divided by gross income) and back‑end DTI (all monthly debt payments divided by gross income). For a conventional mortgage, the back‑end cap is typically 43%. For an FHA loan it can go to 50% with strong compensating factors. For auto loans, DTI over 50% flags you as a default risk even with a good score.
Example: gross monthly income 6,000. Student loan payment 350, car loan 400, minimum credit card 100. That is 850 in debt before housing. Add a 1,500 mortgage payment gives 2,350 total, which is 39.2% DTI. You pass. But if your credit cards carry 800 a month and you add a 1,800 mortgage, you hit 3,050 or 50.8%. Denied.
To optimize: pay down revolving debt before applying. Even a small reduction in minimum payments can drop your DTI below the threshold.
Liquid Assets: Proof You Can Close
A lender needs to see that you have cash to cover the down payment, closing costs, and a reserve buffer. For a home purchase, they typically want two to six months of PITI (principal, interest, taxes, insurance) in liquid accounts after closing. Retirement funds count only if you can access them without penalty. Gift funds are allowed but require a letter and paper trail.
The reserve requirement is often the part that surprises young buyers. If your monthly housing payment is 2,500 and the lender wants three months reserve, you need 7,500 in cash after down payment and costs. That is money you cannot touch for anything else.
Risk: if your assets are tied up in a 401k or crypto, most lenders discount them heavily. Keep a separate high yield savings account labeled for the purchase.
Employment Stability: The Paper Trail
Lenders prefer two years of consistent income in the same line of work. Job hopping within the same industry is fine. Switching from salaried to self‑employed triggers a deeper review: they will want two years of tax returns to average your income. Bonuses and commissions are counted only if you have a two year history.
If you just started a new job, a written offer letter with start date can substitute. But if you are self‑employed and your Schedule C shows a loss one year, that year gets zeroed out. The lender uses the lower of the two years.
Takeaway: do not quit your job or change industries right before applying. If you must, wait until after closing or build a larger asset buffer to offset income volatility.
Loan to Value Ratio: The Collateral Check
LTV measures how much you are borrowing against the asset value. For a home, if you put 20% down, LTV is 80%. For a car, lenders typically cap LTV at 100% to 120% of the vehicle value. Higher LTV means higher risk, so you pay a higher rate or need Mortgage Insurance.
Example: home valued at 400,000. You put 40,000 down (10%). LTV is 90%. You will pay PMI until LTV hits 80%. That adds roughly 0.5% to 1% of the loan balance per year, or about 1,800 on a 360,000 loan. On a 30 year mortgage that extra cost compounds.
The risk: if the appraiser values the property lower than your offer, LTV jumps. You then either bring more cash or the deal falls apart. Always leave a cash buffer for an appraisal gap.
How the Five Factors Interact
No lender evaluates these in isolation. A 750 credit score with a 45% DTI and shaky employment gets a manual underwrite. A 680 score with 30% DTI, cash reserves, and a stable job can get approved at a higher rate. The lender is looking for compensating factors. Strong assets offset low score. Low DTI offsets short employment. High LTV can be mitigated by excellent credit.
Know your weakest link and strengthen it before you submit an application. That means checking your score, calculating your DTI with your target payment, and stacking cash.
The Difference Between Automated and Manual Underwriting
Most conforming loans go through automated underwriting (DU or LP). The system checks your profile against a giant dataset and spits out Approve/Eligible or Refer. Refer means a human underwriter reviews the file. Manual underwriting is slower, more subjective, and requires stronger compensating factors. If you are self‑employed, have a recent bankruptcy, or are buying a unique property, expect a manual review. In that case, every number matters more because there is no algorithm to forgive a borderline metric.
How to Pre‑Optimize Your Profile in Ninety Days
Ninety days is enough time to move the needle on two of the five factors. Do not touch your credit utilization: keep it below 30% and ideally below 10%. Pay down balances to lower your DTI. Do not open new credit cards or close old ones. Do not co‑sign for anyone. Do not pay off old collections without a pay‑for‑delete agreement. Monitor your score weekly with a free tool like Credit Karma to catch errors.
The hardest factor to change fast is DTI because you need actual income or you need to eliminate debt. If you cannot lower DTI, you can increase your down payment to lower LTV or add a co‑borrower with strong income. Both have tradeoffs: a co‑borrower takes on liability and their debt counts too.
The Final Risk You Cannot Ignore
Lenders evaluate your financial profile today, not yesterday. If you have a late payment in the past 12 months, your rate jumps. If you lost your job two weeks before closing, the loan rescinds. Do not make any major financial move between application and closing: no new car, no new credit card, no large cash deposits. One inquiry or one large transfer can trigger a re‑verification and delay or kill the deal. The safest move is to freeze your credit and do nothing.
Understand the five numbers. Optimize the ones you can. Do not gamble your approval on a sixth factor you did not check.
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