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Home Buying Financial Planner

A guided walk-through of buying a home, in the order it happens, with one set of your own numbers carried from stage to stage. Nothing is uploaded — every calculation runs in this browser, and your numbers stay on your device unless you choose to hand them to an AI assistant.

Your plan so far

Your choices appear here as you go.

Stage 1 of 7

Am I ready?

Are my finances in shape for a mortgage, and if not, what would I work on first?

Buyer type

Loan choices in Stage 3 compare conventional, FHA and VA loans, and Stage 6 describes assistance programs for buyers who will live in the home.

$ / year

Before taxes

$ / month

Auto, student, credit cards

$ / month
$

Cash, checking, savings accounts

500–850

Where you stand

Debt-to-Income

—

Other monthly debts ÷ gross monthly income

Savings in Months of Rent

—

Liquid savings ÷ monthly rent

Credit Score

—

Lenders set their own score bands

Cash Flow (pre-tax)

—

Income less debts and rent, before tax

What moves you most

  1. The changes with the most effect on your figures appear here, worked out with your numbers.

What lenders look at first

Debt-to-income compares the payments you already make each month with your gross monthly income. When you apply, a lender adds the new housing payment to those debts and divides the total by your income, so each dollar of existing debt narrows the payment that fits under its limit. For loans underwritten by hand, Fannie Mae’s standard maximum is 36% of stable monthly income, stretching to 45% when its credit score and reserve requirements are met; its automated system allows up to 50%, and other loan types set their own ranges.

Your credit score shapes the rate a lender offers. Lenders set their own score bands, so the same score can be priced differently from one lender to the next. Cash on hand, shown here in months of rent, is where the down payment, the closing costs and a cushion all come from.

Source: Fannie Mae Selling Guide B3-6-02, Debt-to-Income Ratios (as of April 2, 2025)

What this means for you

Your figures, in plain words, appear here.

Go deeper

Assumptions applied

How this planner calculates

  • Monthly payment. Principal and interest use the standard fixed-rate amortization formula, the same one the site’s mortgage calculators use. Property tax, insurance, HOA dues, maintenance and any mortgage insurance are added to reach the total monthly cost.
  • Debt-to-income. Front-end DTI is the total monthly housing cost divided by gross monthly income; back-end DTI adds your other monthly debt payments. Both are shown to two decimal places beside the published guidelines they are compared with, each named with its source in the stage that uses it.
  • Price range. The price at each guideline is solved from your income, other debts, down payment, rate and term, with property tax, insurance, HOA and mortgage insurance held at your target price’s monthly amount.
  • Comparisons. Each option on a decision card is the same planner run again with one choice changed, so a card cannot disagree with the rest of the page.
  • Mortgage insurance. Conventional loans below the down-payment threshold carry PMI at a planning rate; FHA loans carry an upfront and an annual premium; VA loans carry a one-time funding fee. The rates are listed in Assumptions applied; your lender’s quote will differ.
  • Closing costs and cash needed. Origination, appraisal, title, attorney, recording and prepaid escrow are estimated from the conventions listed in Assumptions applied, plus any upfront mortgage insurance. Cash needed adds the down payment and the cushion you choose.
  • Rent vs buy. The planner uses the same method as the Rent vs Buy Calculator. For each year you might move out, the net cost of owning is the down payment, the closing costs (not counting prepaid tax and insurance) and every cost of owning to date, plus the cost of selling, less your equity and the tax saved where mortgage interest and property tax exceed the standard deduction. Mortgage payments count only while the loan is outstanding, so on a loan shorter than the comparison the years after the last payment carry no principal or interest (a correction: the payment used to be counted in every year, which overstated the cost of owning on a shorter loan). The net cost of renting is the rent to date, less the growth on the down payment, closing costs and the monthly difference a renter would invest instead, after an estimated long-term capital-gains tax. The difference is worked out again each year from that year's rent and costs of owning; in a year owning costs less, the buyer invests it instead, and its after-tax growth reduces the net cost of owning. The breakeven year is the first year owning costs less.
  • Tax benefit. The first-year estimate compares mortgage interest plus property tax (capped at the SALT cap) against the standard deduction for your filing status, at your marginal rate. The high-income phase-down of the SALT cap is not modeled.
  • Readiness. Months to goal divides the remaining gap by your monthly savings plus a twelfth of your yearly windfalls. With no saving, the goal is shown as not reachable rather than as a number.

How to Financially Plan for Buying a Home

Buying a home is the largest financial commitment most people make. Whether you’re a first-time buyer, moving up, or purchasing an investment property, the decisions come in an order: where you stand, the price range that fits, the loan, the full cost, how owning compares with renting, and the cash to close. This planner walks through them in that order with one set of your own numbers.

What This Planner Calculates

The walk-through has seven stages. It starts with your income, debts, savings and credit score, then finds the price range at published guidelines and at the payment you would be comfortable with. It compares down payments, loan terms and loan types side by side with your figures, adds up the monthly cost (principal, interest, tax, insurance, mortgage insurance, HOA and upkeep) and the closing costs, compares renting and owning year by year, and works out when your savings would cover the cash to close. It ends with a plan you can print: the choices you made, a checklist, questions for a lender and your Loan Estimate lines.

Key Concepts

Debt-to-income guidelines are ranges, not one rule. The Consumer Financial Protection Bureau’s rule of thumb keeps the total monthly home payment at or below 28% of pre-tax income. Fannie Mae’s standard maximum total debt-to-income ratio for manually underwritten loans is 36%, stretching to 45% with its credit score and reserve requirements, and up to 50% through its automated system. For FHA loans underwritten by hand, HUD starts from 31% and 43% and allows more with compensating factors.

PMI vs MIP — Private Mortgage Insurance (PMI) applies to Conventional loans with less than 20% down; it can be cancelled on request at 80% of the original value and ends automatically at 78%. Mortgage Insurance Premium (MIP) on FHA loans includes an upfront fee (1.75% of the loan) plus annual premiums (0.55%) that last 11 years or the life of the loan, depending on the down payment. VA loans have no monthly mortgage insurance but charge a one-time funding fee (2.15% on first use with the smallest down payments; the fee is lower with more down).

Closing Costs typically range from 2% to 5% of the home price, according to the Consumer Financial Protection Bureau, and include origination fees, appraisal, title insurance, attorney fees, recording fees, and prepaid taxes and insurance. They come on top of the down payment.

A cushion after closing — the CFPB’s way of counting the cash available for closing sets aside an emergency cushion of usually 3 to 6 months of expenses first. The planner lets you choose either end of that range.

Related Calculators

Home buying involves many financial dimensions. These tools go deeper on single questions: the Mortgage Calculator for detailed amortization schedules, the Mortgage Affordability Calculator for maximum home price analysis, the FHA Loan Calculator for FHA-specific scenarios, the Rent vs Buy Calculator for a comprehensive comparison, the Savings Calculator for down payment savings projections, and the Emergency Fund Calculator for post-purchase safety net planning.