What Is Gross Monthly Income? How to Calculate Yours (2026 Guide)

What Counts as Gross Monthly Income

Gross monthly income is the total amount you earn in a month before any taxes, retirement contributions, insurance premiums, or other deductions are removed. It is the "top-line" income number lenders, landlords, and government agencies use to assess affordability.

Net (take-home) income is what's left after all deductions. Gross is always larger.

If your annual salary is $84,000, your gross monthly income is $84,000 ÷ 12 = $7,000 — regardless of how much actually hits your bank account each month.

Why It Matters

• Mortgage lenders apply a 28/36 rule: housing costs ≤ 28% of gross monthly income, total debt ≤ 36% — see Fannie Mae Selling Guide B3-6
• Landlords typically require 2.5–3× gross monthly income vs monthly rent
• Auto lenders use gross monthly income to qualify a car loan
• Federal student loan repayment plans (SAVE, PAYE, IBR) use Adjusted Gross Income but reference gross monthly for affordability snapshots
• Child support calculations in most states begin with gross monthly income

Calculation Method by Income Type

If You're Salaried

Formula: Annual salary ÷ 12

If You're Paid Hourly (Consistent Hours)

Formula: Hourly rate × hours per week × 52 ÷ 12

Example: $24/hr × 40 hrs × 52 = $49,920 annual ÷ 12 = $4,160 gross monthly

If You're Paid Hourly (Variable Hours)

Take your average weekly hours over the last 12 weeks:

(Total hours ÷ 12 weeks) × hourly rate × 52 ÷ 12 = gross monthly

If you have less than 12 weeks of history, use what you have but flag it for the lender — most require at least 90 days of pay history.

If You're Paid Bi-Weekly (26 paychecks/year)

Formula: Gross per paycheck × 26 ÷ 12

Example: $2,500 biweekly × 26 = $65,000 annual ÷ 12 = $5,416.67 gross monthly

Common mistake: multiplying biweekly pay × 2 to get monthly. That underestimates by ~8.3% because some months contain three biweekly checks.

If You're Paid Semi-Monthly (24 paychecks/year)

Formula: Gross per paycheck × 2

Example: $2,700 semi-monthly × 2 = $5,400 gross monthly

This one is clean — you always get exactly two paychecks per month.

If You're Self-Employed or Freelance

Formula: Average of last 24 months' gross receipts ÷ 24

Lenders typically demand two years of tax returns (Schedule C net profit) and average those. For loan/rental purposes:

• Conservative (lender) method: Schedule C net profit ÷ 12
• Aggressive (your max) method: Schedule C gross receipts ÷ 12

Lenders use the conservative number. Always.

If You Have Multiple Income Sources

Add gross monthly income from each source:

For rental income, lenders typically count only 75% of gross rent to account for vacancies. For freelance, they want two years' history.

What Doesn't Count

Gross monthly income for lending and renting purposes typically excludes:

• ❌ One-time bonuses (unless guaranteed in writing and recurring)
• ❌ Sign-on bonuses
• ❌ Stock option exercises
• ❌ Tax refunds
• ❌ Gambling winnings
• ❌ Inheritance or gifts
• ❌ Student loan disbursements
• ❌ Unemployment (in most lending scenarios)

Worked Example: Renting an Apartment

Maria wants to rent a $1,800/month apartment. The landlord requires 3× monthly rent.

• Required gross monthly income: $1,800 × 3 = $5,400
• Maria's salary: $62,400 ÷ 12 = $5,200 ❌ short by $200/mo
• Solution: Maria adds her $400/mo freelance income (verified by recent paystubs) → $5,600 ✅

Worked Example: Mortgage Pre-Qualification

Tom wants a $375,000 mortgage. The lender uses the 28% housing rule.

• Estimated PITI (principal, interest, taxes, insurance): $2,450/mo
• Required gross monthly income: $2,450 ÷ 0.28 = $8,750 minimum
• Tom's salary: $108,000 ÷ 12 = $9,000 ✅ qualifies

Common Calculation Mistakes

1. Confusing gross with net. If you wrote down your take-home pay, multiply by ~1.35 to back into gross.
2. Forgetting "extra" paychecks. Biweekly = 26 paychecks per year, not 24. Two months each year contain three paydays.
3. Including pre-tax 401(k). Pre-tax retirement contributions are still part of gross income — they reduce taxable income, not gross.
4. Using YTD ÷ months elapsed too early in the year. A January paystub × 12 isn't a reliable annualization; lenders want at least 3 months of data.

Use a Paystub to Prove Your Number

The gross YTD line on your paystub, divided by the number of months since January 1, is the most accurate snapshot of your gross monthly income. Lenders use this method exactly. If you need a clean, professional stub to submit, PayStub LLC's generator auto-fills the gross monthly average based on your pay frequency and salary.

Bottom Line

Gross monthly income = total earnings before any deductions, divided into months. Salaried workers: divide annual by 12. Biweekly: per-check × 26 ÷ 12. Self-employed: 24-month average. Lenders and landlords use this number for almost every affordability test, so know yours before you apply.