Illustrative inputs — not a quote or a local average.
Reconcile the annual tax amount
For an Illinois purchase, reconcile the property’s full annual tax amount with the installments and the settlement proration. The annual input should describe the ongoing expense, while a closing adjustment belongs in the cash-to-close worksheet.
Build the cash reserve alongside the payment
Ask which exemptions appear on the seller’s record and which would apply to you. For a condominium, obtain the association budget and any special-assessment information. Enter ordinary dues monthly and retain a separate plan for nonrecurring assessments.
An illustrative sensitivity check
An additional $1,200 in annual tax or insurance adds $100 to the monthly budget. An additional $75 in monthly association dues adds another $900 per year. These are arithmetic examples, not local averages. Change those fields independently to see whether the home still fits before adjusting the mortgage rate or term.
Worked example
Illustrative inputs — not a quote or a local average.
- Loan amount
- $320,000.00
- Interest rate
- 6.5 %
- Loan term
- 30 years
- Annual property tax
- $4,200.00
- Annual home insurance
- $1,800.00
- Monthly HOA dues
- $0.00
- Monthly mortgage insurance
- $0.00
Monthly housing estimate: $2,522.62. Principal & interest: $2,022.62. Total interest: $408,142.36.
Questions, answered
Are the starting figures Illinois averages?
No. They are illustrative inputs shared across the site. Replace tax and insurance with address-specific annual estimates and use an actual loan quote.
Where are the supporting references?
The linked property-tax and insurance guides contain the external references. This state worksheet uses internal links only.