How Mortgage Payments Are Calculated in Maryland: PITI Explained for 2026 Buyers

The most common sticker shock for a first-time Maryland buyer happens the day they receive their first Loan Estimate. They calculated their mortgage payment using a Zillow estimator — got something like "$3,200/month" — and now the lender is showing them a payment of $4,100/month. Where did the extra $900 come from?

The answer: PITI. Your real mortgage payment is the sum of four things, not just the principal-and-interest you Googled.

Here's exactly how Maryland mortgage payments are calculated in 2026, with real MoCo dollar examples.

What is PITI?

PITI is the acronym for the four components of a typical Maryland mortgage payment:

• Principal — paying down the loan balance
• Interest — cost of borrowing
• Taxes — 1/12 of annual property tax, collected by the lender into escrow
• Insurance — 1/12 of annual homeowners insurance, plus mortgage insurance (if applicable), into escrow

Some lenders and calculators add a fifth: HOA dues, if your home is in a homeowners association or condo. Strictly speaking that's not part of PITI (the lender doesn't collect it), but it absolutely affects your monthly housing cost.

How is the principal and interest portion calculated?

This is the part most online calculators get right. The formula is the standard amortization formula:

Monthly P&I = Loan Amount × [r × (1 + r)^n] ÷ [(1 + r)^n − 1]

Where r = monthly interest rate (annual rate ÷ 12) and n = total payments (30 × 12 = 360 for a 30-year loan).

You don't need to do this by hand. Every mortgage calculator does it for you. Just know that:

• The rate you're quoted is annual, but the payment is based on the monthly rate
• The full P&I payment is the same every month (for a fixed-rate loan)
• The split between principal and interest changes monthly — early years are mostly interest, later years are mostly principal

Worked example: $480,000 loan, 6.75% rate, 30-year fixed.

• Monthly P&I: $3,113
• First month: $2,700 interest + $413 principal
• Month 60 (year 5): $2,535 interest + $578 principal
• Month 360 (final): $17 interest + $3,096 principal
• Total interest paid over 30 years: $640,000 on a $480,000 loan

This is why aggressive principal paydown or a 15-year mortgage saves enormous interest. Math is unforgiving.

How is the tax portion of my Maryland mortgage payment calculated?

Your monthly tax escrow = annual property tax ÷ 12.

Property taxes in Montgomery County in 2026 typically run 0.85–1.05% of assessed value, depending on:

• The municipality (Rockville, Gaithersburg, Takoma Park have additional municipal taxes)
• The school district (slight variations)
• Special districts (some neighborhoods have water/sewer/road assessments)

Example: $600,000 home in unincorporated Bethesda:

• Assessed value ≈ $600,000 (assessment matches sale price in most years)
• Property tax rate ≈ 0.95% (state + county + special districts)
• Annual property tax: $5,700
• Monthly escrow for taxes: $475

In Rockville or Takoma Park, the same home might run $6,500–$7,200 annually because of municipal taxes.

For specifics on MoCo property tax, see property tax in Montgomery County, Maryland and Montgomery County property assessment.

How is the homeowners insurance portion calculated?

Your monthly insurance escrow = annual homeowners insurance premium ÷ 12.

Maryland homeowners insurance in 2026 typically runs:

• Standard single-family home: $1,200–$1,800/year
• Older / larger / higher-value home: $1,800–$3,500/year
• Condo (HO-6 policy): $400–$800/year (the building is covered by the master HOA policy)
• Townhouse: $900–$1,500/year

Factors that affect your insurance premium:

• Replacement cost of the home (not market value — the cost to rebuild)
• Age of roof, electrical, plumbing
• Claims history of the property
• Distance to nearest fire station / hydrant
• Coastal proximity (irrelevant in MoCo, big factor in Eastern Shore)

Example: $600,000 MoCo home, standard policy.

• Annual insurance: $1,500
• Monthly escrow: $125

If you're buying a condo, your monthly insurance is much lower because the HOA's master policy covers the building structure. You only insure your "walls in" — your contents, fixtures, and personal liability.

What about mortgage insurance (PMI / MIP)?

If you're putting less than 20% down on a conventional loan, you'll pay Private Mortgage Insurance (PMI).

If you're using an FHA loan, you'll pay Mortgage Insurance Premium (MIP) regardless of down payment.

If you're using a VA loan, no monthly mortgage insurance (huge advantage), but you pay a one-time VA funding fee at closing.

Conventional PMI in 2026 typically runs 0.3% to 1.5% of the loan amount annually, depending on:

• Down payment (more = less PMI)
• Credit score (higher = less PMI)
• Loan amount

Example: $560,000 loan (5% down on $590,000 home), 720 credit score:

• PMI rate: ~0.7%
• Annual PMI: $3,920
• Monthly PMI: $327

PMI automatically cancels when your loan balance reaches 78% of the original home value (federally required), and you can request cancellation when you reach 80% LTV based on a new appraisal.

FHA MIP in 2026 has two components:

• Up-front MIP: 1.75% of the loan amount, paid at closing (usually rolled into the loan)
• Annual MIP: 0.55% of the loan balance, paid monthly

On a $580,000 FHA loan: $3,190/year ≈ $266/month for the annual portion.

FHA MIP does not cancel automatically unless you put down 10%+. Most FHA buyers eventually refinance to conventional once they hit 20% equity to drop the MIP. See FHA, conventional, and VA loans in Montgomery County for the full comparison.

Worked PITI example for a Montgomery County home in 2026

Let's do the math on a real-world MoCo buyer scenario.

Scenario: First-time buyer, $620,000 home in Gaithersburg, 10% down ($62,000), 30-year conventional loan, 6.75% rate, 750 credit score.

Loan amount: $558,000

Monthly breakdown:

| Component | Amount | |-----------|--------| | Principal & Interest (at 6.75%) | $3,619 | | Property Tax (1% × $620K ÷ 12) | $517 | | Homeowners Insurance ($1,500 ÷ 12) | $125 | | PMI (~0.55% × $558K ÷ 12) | $256 | | Total PITI | $4,517/month |

Plus HOA if applicable. Most Gaithersburg single-family neighborhoods have no HOA; some have $300–$1,200/year dues.

Compare to the lender's "rate" quote of 6.75%: If they only quoted P&I ($3,619), the buyer is going to be $900/month surprised. The full monthly housing cost is $4,517 — that's the number to base your affordability calculation on.

What's the "1% rule" for estimating monthly mortgage payments?

A quick rule of thumb I give first-time MoCo buyers:

Your full monthly housing cost (PITI) in MoCo is roughly 1% of the home price.

Examples:

• $400,000 home → ~$4,000/month
• $600,000 home → ~$6,000/month? No — closer to $4,500/month, lower because of down payment leverage
• $1,000,000 home → ~$7,500/month

Wait — the 1% rule overshoots at higher price points. Let me give a more accurate version:

Monthly PITI estimate in MoCo 2026 (with 20% down):

| Home price | Monthly PITI estimate | |-----------|---------------------| | $400,000 | ~$2,800 | | $500,000 | ~$3,500 | | $600,000 | ~$4,200 | | $700,000 | ~$4,900 | | $800,000 | ~$5,600 | | $1,000,000 | ~$7,000 | | $1,500,000 | ~$10,500 |

These are rough estimates at 6.75% rate, 20% down, standard MoCo property tax (~1%), and $1,500/year insurance. Your specific numbers will vary.

For a more rigorous affordability check, see how much home can you afford in Montgomery County.

Why is my mortgage payment higher than the quoted rate suggests?

The most common reason: the rate quote covers only principal and interest. Your full payment includes taxes and insurance — sometimes mortgage insurance too.

A 6.75% rate quote on a $560,000 loan = $3,633/month P&I.

The actual payment with MoCo taxes ($500/month), insurance ($125/month), and PMI if applicable ($250/month) = $4,500/month.

That's $867/month more than the rate-based estimate. Multiplied over 30 years, that's $312,000 in payments your lender's rate quote didn't show you.

This is why I push every Maryland buyer to focus on the PITI number, not just the rate. And to look at the Loan Estimate (which shows the full estimated payment) rather than relying on online calculators.

What happens to my mortgage payment over time?

Three things change your payment:

1. The P&I stays constant on a fixed-rate loan — same in year 1, year 15, and year 30.

2. Taxes change with assessments. Maryland property tax assessments increase periodically (every 3 years in MoCo). When your assessed value rises, your tax bill rises, and your escrow recalculates. Expect your monthly payment to rise by $30–$100/year typically as your home appreciates.

3. Insurance premiums creep up. Homeowners insurance in Maryland has been rising 5–8% annually in 2024–2026. Your escrow recalculates annually to keep up.

4. PMI drops off eventually. Once you hit 78–80% LTV, PMI cancels, and your monthly payment drops by the PMI amount.

5. The actual P&I split changes. Within the same total P&I payment, more goes to principal each month as the loan amortizes. This is the "amortization curve" — slow equity build early, accelerating later.

Can I lower my monthly mortgage payment?

Yes — several levers:

1. Larger down payment. Putting 20% down vs 10% down means a smaller loan and no PMI. On a $600K home, that's roughly $500/month savings.

2. Buy a less expensive home. Obvious but worth saying. Every $50,000 in home price ≈ $350–$400/month in PITI.

3. Lower your rate. Better credit, more shopping, discount points, or waiting for rates to drop. See are mortgage points worth it in Maryland.

4. Longer loan term. A 30-year loan has lower monthly payments than a 15-year, but you pay more interest total.

5. ARM instead of fixed. A 5/1 or 7/1 ARM in 2026 starts at a lower rate, lowering your initial monthly payment. See fixed vs. adjustable-rate mortgage in Maryland.

6. Appeal your property tax assessment. If you believe your home is over-assessed, you can appeal to lower the property tax bill. See Montgomery County property assessment for the process.

7. Shop homeowners insurance annually. Maryland insurance rates have been rising fast. Re-quote your policy every 1–2 years with 3 carriers.

8. Refinance. If rates drop, refinance into a lower rate. Rule of thumb: refinance pays off when the rate drop is 0.75% or more, depending on closing costs.

How accurate are online mortgage calculators?

For P&I only: very accurate — the math is standardized.

For full PITI: inaccurate by 15–25% because most online calculators use generic property tax rates (often 0.5% or just lump $200/month for "taxes") and outdated insurance estimates.

For an accurate estimate, use a calculator that lets you input:

• Your specific MoCo property tax rate (~0.95–1.05%)
• Your actual insurance quote (get 2–3)
• Your specific PMI rate (your lender will quote)
• HOA dues if applicable

Better still: ask your lender for a Loan Estimate for the specific home you're considering. It's federally required, free, and accurate.

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The bottom line

Your Maryland monthly mortgage payment in 2026 consists of:

• Principal + Interest (the "mortgage" most people think of)
• Property tax escrow (1/12 of annual MoCo tax, typically ~$400–$700/month)
• Homeowners insurance escrow (1/12 of annual premium, typically ~$100–$200/month)
• Mortgage insurance if applicable (PMI on <20% down conventional, MIP on FHA)
• Plus HOA dues if applicable (not in PITI but affects your housing cost)

The single biggest mistake first-time buyers make: budgeting based on the rate quote instead of the full PITI. Always look at the Loan Estimate. Always include taxes, insurance, and HOA in your monthly affordability calculation.

For a $600,000 MoCo home with 20% down at 2026 rates, expect a full monthly payment of roughly $4,000–$4,500. The rate is only part of the story.

For related affordability planning, see how much home can you afford in Montgomery County and what salary do I need for a mortgage in Maryland.

Want me to run the actual PITI on a specific Montgomery County home you're considering? Call (301) 357-1170 — I'll prepare a one-page breakdown within 24 hours.