Naperville, Illinois Mortgage Calculator - Monthly Payment with Taxes, PMI & Insurance
Naperville inherits the DuPage County property-tax planning benchmark of about 2.10% for this high-demand west suburban Chicago market; some Naperville addresses sit in Will County rather than DuPage. On a $400,000 Naperville example with 20% down at 6.5% for 30 years, principal and interest are about $2,023; tax escrow is about $700/mo, for estimated PITI near $2,823 before PMI. Confirm the parcel's overlapping districts before treating escrow as final.
Loan Details
$70,000 · LTV 80%
Buyer Profile
Extra Payment
Optional principal-only payment used to estimate payoff speed and interest savings.
Monthly Payment
$1,770 Principal & Interest · $613 Property Taxes · $125 Other
Methodology and limitations
Last reviewed:
Methodology
Uses standard principal-and-interest mortgage math, then models housing-cost inputs such as tax, insurance, PMI, and extra-payment scenarios where available. National pages include worked PITI, term, and PMI comparison examples for planning.
Limitations
Planning estimate only. Actual approval, escrow, PMI, fees, taxes, insurance, and closing disclosures depend on lender, property, borrower profile, and local rules.
Naperville, Illinois Mortgage Calculator - Monthly Payment with Taxes, PMI & Insurance
Illinois · DuPage County
Naperville inherits the DuPage County property-tax planning benchmark of about 2.10% for this high-demand west suburban Chicago market; some Naperville addresses sit in Will County rather than DuPage. On a $400,000 Naperville example with 20% down at 6.5% for 30 years, principal and interest are about $2,023; tax escrow is about $700/mo, for estimated PITI near $2,823 before PMI. Confirm the parcel's overlapping districts before treating escrow as final.
Use this mortgage calculator for Naperville, Illinois to estimate the monthly payment with principal, interest, configured annual taxes, eligible exemptions, and assistance programs when the buyer profile matches the conditions.
What This Estimate Uses
- Geographic level: city
- Configured property tax rate: 2.10%
- Configured benefits or exemptions: 2
- Reviewed sources: 4
What Changes in Naperville, Illinois
- Data level used: city. This page uses the most specific available data layer for Naperville, Illinois.
- Configured combined annual property tax rate: 2.10% before exemptions and buyer-specific conditions are applied.
- Configured down payment assistance programs: IHDA Access Down Payment Assistance.
Local Tax Assumptions
These are the annual tax assumptions configured for this page. The calculator applies them to the appropriate value, then accounts for exemptions or conditions when the buyer selects them.
- Illinois Local Property Tax - 2.100%
Programs and Exemptions Included
These benefits do not mean automatic approval. The calculator models them when the buyer inputs match the configured eligibility conditions.
- IHDA Access Down Payment Assistance - 5% of loan, up to $10,000 (requires: first-time buyer, primary residence)
- Mortgage Credit Certificate (MCC) - 20% of mortgage interest (requires: first-time buyer, primary residence, buyer has a Mortgage Credit Certificate)
When This Estimate Can Change
- The actual property tax bill depends on the address, overlapping taxing jurisdictions, approved exemptions, and appraised value.
- Home insurance, flood insurance, HOA dues, and PMI can vary by property, lender, and buyer profile.
- Configured closing costs include Illinois State Real Estate Transfer Tax, but other settlement charges may appear on a real loan estimate.
2025 Local Home-Purchase Mortgage Market in DuPage County, Illinois
Local home-purchase mortgage market context for DuPage County, Illinois: in 2025 Home Mortgage Disclosure Act (HMDA) data, DuPage County logged 11,988 final-action applications. The mortgage denial rate was 6.11% and the originated share was 72.20%.
These figures reflect the county market, not the city alone.
| Metric | DuPage County | State |
|---|---|---|
| Final-action applications | 11,988 | 183,437 |
| Mortgage denial rate | 6.11% | 9.41% |
| Originated share | 72.20% | 68.94% |
Source: FFIEC HMDA 2025 (LAR modificado, compra de vivienda) · Texas vs California mortgage denial rates (methodology)
Nearby location comparison
Planning comparison on a $400,000 home with 20% down, 6.5% fixed for 30 years, and $100/mo insurance. Monthly tax uses each page's configured property tax rate.
| Location | Est. property tax rate | Est. monthly tax | Est. monthly PITI |
|---|---|---|---|
| Naperville (this page) | 2.10% | $700 | $2,823 |
| Cook County | 2.20% | $733 | $2,856 |
| Kane County | 2.30% | $767 | $2,889 |
| Lake County | 2.30% | $767 | $2,889 |
| McHenry County | 2.40% | $800 | $2,923 |
| Will County | 2.40% | $800 | $2,923 |
Local Data and Sources
Last editorial verification: May 15, 2026. This page combines the official data layers configured for Naperville, Illinois.
The sources used on this page are Consumer Financial Protection Bureau mortgage cost guidance, Illinois Department of Revenue property tax statistics, Illinois Department of Revenue real estate transfer tax, Illinois Housing Development Authority Access Mortgage. Each source lists which rate, exemption, or program it validates and when it was last reviewed.
- Consumer Financial Protection Bureau mortgage cost guidance - verified May 3, 2026 - General U.S. mortgage closing-cost and mortgage-cost guidance.
- Illinois Department of Revenue property tax statistics - verified May 15, 2026 - Official source for Illinois property-tax statistics and effective tax-rate context.
- Illinois Department of Revenue real estate transfer tax - verified May 15, 2026 - Official source for Illinois state real estate transfer tax guidance.
- Illinois Housing Development Authority Access Mortgage - verified May 15, 2026 - Official IHDA source for Illinois mortgage and down payment assistance programs.
Frequently Asked Questions
Why are Illinois property taxes so important for mortgage estimates?
Illinois escrow payments can be heavily affected by school, municipal, county, park, and special district taxes. A principal-and-interest-only estimate can materially understate monthly cost. Use this state mortgage calculator to combine that assumption with principal, interest, insurance, and PMI, then drill into county or city pages when you have a specific address.
What Illinois buyer assistance is modeled?
The state file models IHDA-style down payment assistance as a conservative percentage of loan amount capped at a planning maximum. Use this state mortgage calculator to combine that assumption with principal, interest, insurance, and PMI, then drill into county or city pages when you have a specific address.
What is a sample Illinois PITI on $400,000?
With 20% down at 6.5% for 30 years, principal and interest are about $2,023. At ~2.10% statewide property-tax planning rate, monthly escrow is about $700; with $100 insurance, estimated PITI is about $2,823 without PMI. Drill into county or city calculators for address-level millage.
Why include DuPage County?
DuPage captures Naperville, Wheaton, Downers Grove, and other high-volume west suburbs of Chicago where overlapping school and municipal districts drive escrow. A county-level mortgage calculator helps buyers separate tax assumptions from loan rate quotes before comparing nearby Cook or Kane County scenarios.
How do DuPage County property taxes affect mortgage escrow?
DuPage taxes are the sum of overlapping local districts. This page's configured rate turns a $400,000 value into annual tax ÷ 12 for escrow planning. Shop insurance separately and remember Illinois transfer taxes can raise cash needed at closing beyond the monthly payment.
What is a sample DuPage County mortgage payment?
On $400,000 with 20% down at 6.5% for 30 years, P&I is about $2,023. Add monthly tax from the county rate plus ~$100 insurance to estimate PITI. If you put less than 20% down, include PMI until you reach roughly 80% equity.
What property tax rate does the Naperville mortgage calculator use?
Naperville uses the DuPage County planning benchmark of about 2.10% on this page. On a $400,000 home that is roughly $8,400 per year or $700 per month in escrow before exemptions or special districts. Parcel bills can still differ—verify the local levy code on the address you are buying.
What is a sample Naperville PITI on $400,000?
With 20% down at 6.5% for 30 years, principal and interest are about $2,023. At ~2.10% property tax, monthly escrow is about $700; with $100 insurance, estimated PITI is about $2,823 without PMI. Enter your real price and down payment above to resize the estimate, including PMI if you put less than 20% down.
Can a Naperville home be in Will County?
Yes. Most Naperville planning on this page uses DuPage County's ~2.10% benchmark, but some properties are in Will County with different millage. Verify the county and school district on the parcel, then rerun PITI with the matching assumptions. Treat calculator results as planning estimates until you have a Loan Estimate and a parcel-specific tax bill.