How much can you borrow?
Enter what you earn and what you already owe each month, and this estimates the loan a lender is likely to size for you. It is arithmetic, not an approval.
A rough figure, and deliberately so. The loan amount you are actually offered depends on credit score, debt-to-income ratio, how much of your income is documented and how long you have earned it, cash reserves left after closing, the loan program, the property type and its appraisal, and the rate you are actually quoted on the day you lock. Two people with identical incomes routinely get different numbers. Treat this as the shape of the answer and get a written pre-approval before you shop.
What actually makes up a monthly housing payment here?
Four things, and only the first comes from the loan. Principal and interest, property tax, insurance, and in most newer communities a special tax and association dues on top.
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| Part of the payment | What decides it |
|---|---|
| Principal and interest | Loan amount, rate and term |
| Property tax | What you paid, not what the seller paid |
| Homeowners insurance | The structure, the location and the insurer |
| Mortgage insurance | Applies below a down payment threshold, and on FHA at any |
| Mello-Roos or special assessment | The district, in newer communities |
| Association dues | The association, paid separately from all of the above |
The calculator above takes all of them as inputs, which is deliberate. A mortgage calculator that asks only for price, rate and term will understate an Orange County payment badly, because in this county the last three rows are frequently several hundred dollars a month between them.
Your lender collects the tax and insurance monthly through an escrow account and pays them when due, so what leaves your account is one figure covering several bills. Association dues are the exception and are paid by you directly to the association.
How does property tax actually work after I buy?
Proposition 13 caps the base rate at 1 percent of assessed value and holds growth in that value to 2 percent a year. A sale reassesses the home.
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The base rate is 1 percent of assessed value, and that assessed value grows by a capped amount each year rather than tracking the market. Buying resets it: your assessed value becomes what the home is worth at purchase, which is why a long-held home carries a tax bill bearing no relationship to the one you will receive.
The 1 percent is a floor rather than the whole bill. Voter-approved bond debt sits on top and differs by area, direct levies are added separately, and a special tax is not included in any of it. Then a supplemental bill arrives after you buy, sometimes two, separate from the regular November and February instalments, covering the move from the previous owner's taxable value to yours. Budget for it before closing.
What is Mello-Roos and what does it add?
Mello-Roos is a special tax levied by a community facilities district under California's Mello-Roos Community Facilities Act of 1982, charged on top of the Proposition 13 1 percent base rate.
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| How you are buying | What the rules requires |
|---|---|
| New construction | The builder hands you a signed "NOTICE OF SPECIAL TAX" before selling a lot that carries the tax, stating the property "is subject to a special tax, that is in addition to the regular property taxes." |
| Resale | The seller has to "make a good faith effort to obtain a disclosure notice concerning the special tax" from the agency that levies it, and then deliver it to you. |
A special tax levied by a community facilities district, charged on top of the 1 percent base rate, funding the infrastructure and services that made newer communities possible: roads, schools, parks, and in some districts police and fire. Any estimate based on 1 percent excludes it entirely, so it has to be added to the tax line by hand.
The district sets its own amount and it reaches your bill through the county each year. Ask for it in dollars per year rather than as a rate, and ask when it ends, because it has a term and knowing the remaining years changes what the home actually costs you over your ownership.
What does insurance cost in Orange County now?
More than it used to, and in canyon and coastal areas it has become a real line in the budget rather than a rounding error. In some cases it is the hardest part of a purchase to arrange.
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Your lender requires it, so it is not optional, and it is collected monthly alongside the tax. What has changed is availability: in higher-risk areas standard carriers have withdrawn, leaving the state's insurer of last resort, which is more expensive and covers up to a limit that a higher-value home can exceed. Above that ceiling, additional cover has to be assembled on top.
The practical advice is to get a quote during your investigation period rather than at the end. Standard cover also excludes earthquake and flood, both of which are separate policies here and both of which a buyer should at least price before deciding they do not want them.
What does a $950,000 Orange County home cost per month?
A $950,000 Orange County purchase with 20 percent down at an assumed 6.500 percent rate gives a partial monthly total of $5,595.39. That is $4,803.72 of principal and interest plus $791.67 of base property tax.
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| Line | Assumption or amount | Where it comes from |
|---|---|---|
| Purchase price | $950,000 | Assumed |
| Down payment, 20 percent | $190,000 | Assumed |
| Loan amount | $760,000 | Price minus down payment |
| Loan term and type | 360 payments, fixed rate, fully amortizing | Assumed |
| Interest rate | 6.500 percent, illustrative | Assumed; reflects no lender pricing |
| Against the 2026 Orange County conforming limit | Below the $1,249,125 one-unit limit | The Federal Housing Finance Agency's 2026 county limits |
| Monthly principal and interest | $4,803.72 | Amortization formula |
| Assessed value at purchase | $950,000 | Reassessed to the price you pay |
| Property tax at the 1 percent base rate, annual | $9,500 | The 1 percent Proposition 13 base rate |
| Property tax at the 1 percent base rate, monthly | $791.67 | $9,500 divided by 12 |
| Partial monthly total shown | $5,595.39 | Principal and interest plus base tax only |
| Not included | Voter-approved bond rates, direct assessments, any Mello-Roos special tax, homeowners insurance | Varies by parcel and insurer |
Every input in that table is an assumption rather than a quote, including the rate. There is no mortgage insurance in it, because at 20 percent down on a conventional loan none applies.
To turn it into a real figure for a specific home, add that address's actual tax rates, any special tax from the parcel notice, and an insurance quote. Those three are the difference between a planning number and your number.
What does a $1,600,000 Orange County home cost per month?
At $1,600,000 with 20 percent down, an Orange County buyer borrows above the 2026 conforming limit of $1,249,125, with monthly principal and interest of $8,302.06 at an assumed 6.750 percent.
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| Line | Assumption or amount | Where it comes from |
|---|---|---|
| Purchase price | $1,600,000 | Assumed |
| Down payment, 20 percent | $320,000 | Assumed |
| Loan amount | $1,280,000 | Price minus down payment |
| Loan term and type | 360 payments, fixed rate, fully amortizing | Assumed |
| Interest rate | 6.750 percent, illustrative | Assumed; reflects no lender pricing |
| Against the 2026 Orange County conforming limit | Above the $1,249,125 one-unit limit, so jumbo terms apply | The Federal Housing Finance Agency's 2026 county limits |
| Monthly principal and interest | $8,302.06 | Amortization formula |
| Assessed value at purchase | $1,600,000 | Reassessed to the price you pay |
| Property tax at the 1 percent base rate, annual | $16,000 | The 1 percent Proposition 13 base rate |
| Property tax at the 1 percent base rate, monthly | $1,333.33 | $16,000 divided by 12 |
| Partial monthly total shown | $9,635.39 | Principal and interest plus base tax only |
| Not included | Voter-approved bond rates, direct assessments, any Mello-Roos special tax, homeowners insurance | Varies by parcel and insurer |
The property tax alone adds about $1,333 a month at the base rate, before any bond debt or special tax. The rate assumed here is higher than in the first example, to show how much the payment moves on a larger loan when the rate does.
This loan is above the Orange County conforming limit, so it is a jumbo, which means the lender sets its own terms rather than following a shared rulebook. Expect a larger down payment and reserves, and see our jumbo loans page for what changes.
What do closing costs add, and where do I see them?
Closing costs are the one-time charges to get the loan and transfer ownership, and they appear on the Loan Estimate rather than in the monthly payment.
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Closing costs are what you pay to get the loan and transfer ownership: appraisal, title insurance, government taxes, lender fees, and prepaid items such as property taxes, insurance and interest up to your first payment. That last group is where the monthly arithmetic meets the closing table, and it is why the cash you need at closing is more than the down payment.
You will see all of it on your Loan Estimate, which arrives within three business days of applying and is designed so that offers from different lenders can be compared line by line. Get two or three, on the same day, and compare the whole page rather than the rate.
What does the calculator not tell me?
Three things, and each of them has cost buyers here more than a rate difference would: the supplemental tax bill, dues that rise, and what a lender will actually approve.
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The supplemental bill arrives months after closing and covers the difference between the seller's old assessment and your purchase price for the rest of the tax year. It is a one-off, it is not a mistake, and it lands when you have just spent everything on moving. Association dues are the second: in a newer community they frequently rise once the builder stops subsidising them, so ask what they have done over the last three years rather than only what they are today.
The third is the difference between arithmetic and approval. The calculator uses a debt-to-income limit as an input because lenders differ and the number moves by loan programme. What you are actually approved for depends on your documented income, your credit, your reserves and the property. Treat the figure above as the shape of the answer and get a lender to give you the real one.
FAQs
Common questions about Loan Calculator
How much can I borrow in Orange County?
Use the calculator at the top of this page: it works backwards from what you earn and what you already owe, and takes association dues and any special tax as inputs, which is where an Orange County answer diverges from a national one. Then get a lender to give you the real figure against your documented income.
What makes up my monthly payment?
Principal and interest, property tax, homeowners insurance, mortgage insurance if your down payment is below a threshold, plus a special tax in many newer communities and association dues on top. Only the first comes from the loan, and in this county the last three are often several hundred dollars a month between them.
Will my property tax match the seller's?
No, and this is the most common budgeting mistake here. Buying resets the assessed value to what the home is worth at purchase, so a long-held home carries a bill bearing no relationship to yours. Budget on roughly 1 percent of what you pay, plus bond debt and any special tax.
What is the supplemental tax bill?
A separate bill arriving months after closing, sometimes two, covering the move from the previous owner's taxable value to yours for the remainder of the tax year. It is not a duplicate and not a mistake, and it lands just after you have spent everything on moving. Set money aside for it before you close.
What does Mello-Roos add?
A special tax on top of the 1 percent base rate, funding the infrastructure and services that made newer communities possible. Any estimate based on 1 percent excludes it entirely. Ask for it in dollars per year rather than as a rate, and ask when it ends, because it has a term.
Why is insurance suddenly a problem in Orange County?
In canyon and coastal areas standard carriers have withdrawn, leaving the state's insurer of last resort, which is more expensive and covers up to a limit a higher-value home can exceed. Get a quote during your investigation period rather than at the end, because occasionally it is the hardest part of a purchase to arrange.
Does standard insurance cover earthquake and flood?
No, both are separate policies here, and a buyer should at least price them before deciding against them. Much of coastal and canyon Orange County sits in at least one mapped hazard zone, which is disclosed to you and is worth reading rather than filing.
What are closing costs and how much are they?
What you pay to get the loan and transfer ownership: appraisal, title insurance, government taxes, lender fees, and prepaid property taxes, insurance and interest up to your first payment. They are why the cash you need at closing exceeds the down payment, and they appear in full on your Loan Estimate.
When do I get a Loan Estimate?
Within three business days of applying, and it is designed so offers from different lenders can be compared line by line. Get two or three on the same day and compare the whole page rather than the rate, because a rate bought down with points is a different product from one without.
Is the calculator on this page an approval?
No. It is arithmetic for planning, using a debt-to-income limit you can adjust because lenders differ and the number moves by loan programme. What you are actually approved for depends on documented income, credit, reserves and the property itself. Treat it as the shape of the answer.