Refinancing your mortgage in Illinois
A straight read on when it makes sense, what it costs, and how to do the math before you call a lender. Drop your current loan into our comparison tool to see the numbers for your situation.
The Illinois picture
Illinois has the second-highest effective property tax rate in the country, and Cook County, which contains Chicago and roughly 40 percent of the state's population, runs even higher than the state average. That one fact reshapes how refinancing math works here. The interest rate on your loan is one component of the monthly payment. In many suburban Chicago markets, the property tax escrow is an equal or larger component. A refinance changes the interest piece; it does nothing to the tax piece.
That does not mean refinancing is a bad idea in Illinois. It means the calculation requires a complete picture. The rate savings are real. The break-even timeline is often longer than it looks if you are comparing total-payment dollars instead of principal-and-interest dollars. And the IHDA Access programs, while designed for purchases, signal a state-level infrastructure worth understanding if you are an existing IHDA borrower considering your options.
Illinois effective property tax rate averages 2.23 percent statewide, running to 2.8 percent in parts of Cook County. No statewide mortgage recording tax. Chicago transfer tax on sales is tiered but does not apply to refinances. IHDA Access programs are purchase-only. Closing costs run 2 to 3 percent of the loan amount, close to the national average.
When refinancing makes sense in Illinois
The break-even formula is the same as everywhere else. Total closing costs divided by monthly principal-and-interest savings. The Illinois-specific issue is to make sure you are comparing P&I to P&I, not total payment to total payment. In suburban Cook County, property taxes on a $400,000 home can add $700 to $900 a month to your payment. If taxes just went up, your total payment is higher whether you refinance or not. Isolate the interest savings.
The signals worth acting on in Illinois:
- Rate drop of 0.75 percent or more. On a $380,000 loan, a 0.75-point improvement saves roughly $175 a month on P&I. Clearing $9,000 in closing costs takes about 51 months. A full point saves roughly $235 a month and clears the same costs in 38 months.
- Pending property tax appeal with a favorable outcome. A successful PTAB or Board of Review appeal can reduce the assessed value and annual tax bill, which lowers the escrow requirement on the new loan. If you have a good-faith appeal in flight, waiting for the result before refinancing gives you a more accurate escrow projection.
- FHA to conventional. Illinois has a strong share of FHA-financed buyers, especially in suburban Cook and Collar counties. Reaching 20 percent LTV and refinancing out of permanent FHA MIP is a compelling reason to refi even without a significant rate improvement.
- ARM resetting. Adjustable-rate loans from 2020 to 2022 are hitting their first adjustment period. If the new rate on an ARM is at or above current 30-year fixed rates, locking makes financial sense.
No mortgage recording tax in Illinois means the cost stack is not inflated by state-level levies the way it is in New York or Florida. Closing costs are driven by lender fees, title insurance, and the elevated local recording fees in Cook County, which run $300 to $600 higher than rural Illinois counties but are not material relative to the loan balance.
What is actually happening in the Illinois market
Chicago and the metro area in 2026 are in a slow-growth mode. The broader Cook County market has seen flat to modestly positive price appreciation over the last 18 months, a significant improvement from the mild decline seen in 2023 when rates first spiked to 7.5 percent and above. The city proper is highly neighborhood-dependent; the North Shore and Northwest Side have held up well, while some South Side and West Side markets remain under downward pressure.
The Collar counties, DuPage, Lake, Will, Kane, and McHenry, have performed better than Chicago city. In-migration from Chicago and continued remote work adoption have kept demand steady. Median prices in DuPage County run $380,000 to $450,000, where refinancing math looks a lot like the national average.
Downstate Illinois, Peoria, Springfield, Rockford, and the smaller agricultural communities, operates in a different universe. Median prices are $150,000 to $220,000. Property taxes are lower than Cook County but still above the national median. The population in many downstate markets is flat or declining, which means price appreciation is minimal and refinancing for equity-building reasons is less compelling than in growth markets.
One structural Illinois issue worth knowing: the state has chronic pension funding shortfalls and recurring property tax reform debates. The political risk of further property tax increases is real, particularly in Cook County. If you are projecting escrow costs over a long refinance horizon, use a conservative assumption about property tax growth rather than assuming it stays flat.
A worked example
Take a homeowner in Naperville with a $400,000 conventional 30-year loan at 7.25 percent, originated in late 2023. Their principal and interest payment is roughly $2,729 a month. Today they could refinance to a 6.5 percent 30-year, dropping that payment by about $200 a month.
| Item | Current | After refinance |
|---|---|---|
| Loan balance | $400,000 | $400,000 |
| Rate | 7.25% | 6.5% |
| Principal & interest | $2,729 | $2,529 |
| Monthly savings | — | $200 |
Closing costs on an Illinois refinance at this balance run about $9,500: $3,200 lender and origination fees, $2,000 title insurance, $600 appraisal, $450 in Cook/DuPage County recording fees, $50 state recording fees, and roughly $3,200 in prepaid taxes and insurance. Stripping out the prepaids, the true sunk cost is closer to $6,300.
Break-even: $6,300 divided by $200 a month equals 32 months, just under three years. Over a typical 7-year hold, the borrower saves $10,500 net of closing costs.
Now add the Illinois property tax picture. If this Naperville home carries a 2.0 percent effective tax rate, the annual tax bill is roughly $9,200, or $767 a month in escrow. That escrow amount does not change with the refinance. The total new payment is $2,529 plus $767 plus $180 in insurance, or $3,476, compared to $3,676 before. The refinance moves it by $200, not by $947. Making sure you understand which part of the payment the refinance actually changes is the most important insight for Illinois borrowers.
Run the same math with your own loan in the Illinois mortgage comparison tool.
Frequently asked questions
How high are Illinois property taxes and how do they affect refinancing?
Illinois has the second-highest effective property tax rate in the country, averaging roughly 2.23 percent statewide and running 2.0 to 2.8 percent in Cook County depending on the municipality. On a $350,000 home in suburban Cook County, annual property taxes run $7,000 to $9,800, or $580 to $820 a month in escrow. This makes the tax-and-insurance portion of the monthly payment enormous relative to the loan payment itself. When you run a refinance comparison, the interest-rate savings appear smaller as a share of total payment than they would in a low-tax state. The rate math still works the same way; the escrow amount is just not affected by refinancing.
What is the Cook County equalizer and how does it affect my assessed value?
The Cook County equalizer, officially the State Multiplier, is a factor applied by the Illinois Department of Revenue to bring Cook County assessments in line with the state's 33.33 percent of market value standard. The equalizer typically runs between 2.6 and 3.0 in Cook County, meaning the assessed value on your tax bill is your appraiser's estimated value multiplied by the equalizer, then divided by three to get the equalized assessed value (EAV). The practical effect is that your tax bill is based on roughly the full market value, making Cook County one of the highest effective-rate environments in the country. A property assessment appeal through the Assessor's office or the Board of Review can lower this and reduce your annual tax bill independent of any refinancing decision.
What is PTAB and can it lower my property tax bill?
PTAB, the Property Tax Appeal Board, is the Illinois state agency that hears property tax appeals after the county board-level review process. Filing a PTAB appeal is the second step if you lose or get an unsatisfactory outcome at the Cook County Board of Review. Appeals take 12 to 24 months to resolve but can result in retroactive refunds if successful. For a refinancing decision, this matters because a successful appeal can change the escrow calculation on your new loan. If you have a pending appeal with a likely positive outcome, it may be worth waiting for the result before closing a refinance.
What is the IHDA Access program?
The Illinois Housing Development Authority runs the Access Forgivable Assistance program, which provides 4 percent of the purchase price (up to $6,000) as a forgivable second mortgage for down payment and closing costs, forgiven over 10 years. IHDA also runs Access Deferred and Access Repayable options with different structures. These are purchase programs, not refinance programs. For refinancing, IHDA does not generally offer a parallel product, but if you originally bought with an IHDA loan, contact them about any rate-reduction programs for existing borrowers before shopping the open market.
What is the Chicago transfer tax and does it apply to refinances?
Chicago has a tiered real estate transfer tax on sales: $3.75 per $500 for the buyer on the first $500,000, $7.50 per $500 above that, and $15.00 per $500 above $1.5M. This is a tax on the sale of property, not on refinancing. A refinance, which does not change ownership, does not trigger the Chicago transfer tax. The tax does matter if you eventually sell; a $600,000 sale in Chicago generates about $4,500 in transfer taxes just on the buyer side.
How much does it cost to close a refinance in Illinois?
Illinois refinance closing costs typically run 2 to 3 percent of the loan amount, which is at the national average. On a $350,000 loan that is roughly $7,000 to $10,500 covering lender origination, title insurance, settlement fees, recording, appraisal, and prepaid items. Illinois does not have a statewide mortgage recording tax, so the cost structure is not inflated the way New York or Florida is. Chicago city and Cook County recording fees are slightly higher than rural counties but not materially so.
Is the Cook County senior freeze helpful for refinancing decisions?
The Senior Citizen Assessment Freeze Homestead Exemption caps the equalized assessed value for qualifying seniors at the level from the year they qualified, as long as they continue to meet income requirements. If you benefit from this freeze, your property tax does not increase with rising market values, which means the escrow portion of your payment is more predictable than for non-senior owners. For refinancing, the freeze is helpful because it removes one source of payment uncertainty from the comparison. The freeze is administered by the Cook County Assessor and requires annual application.