"Buying Again in California at 55 or Older: Can I Take My Property Tax Base With Me?"

Yes, if you are at least 55 and both homes are your principal residence. California's Proposition 19 lets you move the taxable base year value of the home you sold to a replacement home anywhere in the state, up to three times in your life. You have two years between the sale and the purchase, and the claim goes to the county assessor where your new home is.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996, NMLS #483943, through C2 Financial Corporation, licensed in fifteen states, including California.

This is the rule that decides whether a lot of California owners move at all. Somebody who bought in the nineties and stayed is paying tax on a number set decades ago, and the assumption is that moving means giving that up and starting over at today's price. That is what happens to a buyer who is under 55. Once you reach 55 you have the option of carrying the old taxable value to the next home. On a home you have held for a long time, that usually saves you more every month than anything you could negotiate on the purchase itself.

Why does moving usually raise the property tax in California?

Because California taxes a home on its base year value rather than on a fresh appraisal each year, and a sale resets that value.

Article XIII A of the state constitution limits the basic property tax to one percent of what the assessor calls the home's full cash value. On a home that has just changed hands, that value is normally the price it sold for. Voter-approved local debt gets added on top of that one percent. The same article limits how fast the taxable value can rise while one owner holds the home. Hold a home for twenty-five years and the taxable value drifts up slowly while the market value does not. That gap is the whole reason a long-time owner's bill looks nothing like the bill on the identical home next door that sold last spring.

When the home changes hands, the assessor sets a new base year value at the purchase price as of the transfer date. The supplemental tax bill that arrives after a California closing is how the county reconciles that mid-year. It is worth reading whatever your circumstances, because that bill comes to the owner rather than to the lender.

So the default is a reset, and for most California buyers that is simply the rule. Proposition 19 is the exception that runs the other way for a specific group of owners, and you have to claim it. Nothing about it happens automatically at closing.

What does Proposition 19 actually move?

It moves the taxable value. The price you agree to pay and the tax rate your area charges are both unaffected.

The California State Board of Equalization's Proposition 19 page and its Proposition 19 fact sheet, Publication 801 set out the base year value transfer. An eligible homeowner may transfer the taxable base year value of a principal residence to a replacement principal residence. Four conditions come with that sentence, and they are worth going through one at a time.

You are at least 55 years old. The provision also covers a homeowner who is severely and permanently disabled, and separately a homeowner whose home was substantially damaged or destroyed by wildfire or another declared disaster. The age test applies to the person making the claim, so in a married couple it only takes one of you.

Both homes are principal residences. The home you sold has to have been your principal residence, and it has to have been eligible for the homeowners' exemption or the disabled veterans' exemption. The replacement has to become your principal residence too. A rental you own, a second home at the lake, an investment property: none of those carry a base year value anywhere.

Anywhere in California. Proposition 19 changed this, and somebody who looked into a move years ago may still have the old version in mind. Under the older rules, a transfer generally had to stay inside the same county unless that county had opted in to accept transfers from elsewhere. The current rule is statewide. You can sell in one county and buy in another without losing the base.

Up to three times. An eligible homeowner may use the transfer up to three times. The Board of Equalization describes Social Security numbers as the mechanism the state uses to verify eligibility and to prevent more than three transfers, so this is counted at the state level rather than at the county counter. If you used one of these years ago, it counts against the three.

Then there is the clock, and most of the planning turns on it. The replacement has to be purchased or newly constructed within two years of the sale of the original home. Two years is a long time compared to most real estate deadlines, and it starts running the day the original home sells, so it is worth writing that date down at the closing rather than working it out later.

What happens when the replacement home costs more than the one I sold?

You keep the old base and add the difference, so the benefit does not disappear the moment you buy up. That is worth knowing before you settle on a price range.

If the replacement is of equal or lesser value, the base year value transfers across. If it costs more, the Board of Equalization states the arithmetic plainly: the difference between the full cash values is added to the transferred taxable value.

Taxable value of the home you sold
Plus: full cash value of the replacement
Less: full cash value of the home you sold
= new base year value on the replacement

So you are taxed on your old number plus only the step up in value between the two homes. Somebody moving from a home they have held a long time to something modestly more expensive can end up with a taxable value far below the price they just paid.

That number matters to your loan as much as it matters to your tax bill. The price a whole payment actually supports runs on principal, interest, taxes, insurance and any association dues together, and on a California purchase the tax line is a large share of it.

What are the steps, in order?

1. Confirm the count and the eligibility before you list. You need to know how many of the three you have already used and whether the home you are selling carried the homeowners' exemption. Your county assessor's office is the place to ask, and asking costs nothing.

2. Get the taxable value of your current home off your tax bill. It is on the annual bill and on the assessor's parcel record. That figure is the one that travels, and on a home you have held a long time it looks nothing like what the home is worth today.

3. Decide the sequencing, then price the move both ways. Selling first and buying first are different transactions with different cash requirements, and whether to buy first or sell first is the decision that usually sets everything else. The two-year window is wide enough that Proposition 19 rarely forces the order by itself.

4. Price the replacement home using the tax figure you expect to carry, rather than the county's default estimate. If the payment is built on a tax estimate taken from the purchase price, the monthly figure comes out too high, and the price range you are shown ends up smaller than the one you actually have. So please tell whoever is pricing the loan that you expect to carry a base year value, and give them the figure from step two.

5. Get pre-approved with your actual documents. What a real pre-approval involves is a review of income, debts, credit and assets rather than a form and a letter, and the qualifying half of it is the same everywhere. The costing half changes at the state line, which is what the California mortgage page covers.

6. File the claim with the county assessor where the replacement home is. The form is BOE-19-B, the Claim for Transfer of Base Year Value to Replacement Primary Residence for Persons at Least Age 55 Years. The claim has to be filed within three years of the date the replacement was purchased or its new construction was completed. A claim filed later than that can still be granted going forward, starting with the year it is filed, rather than reaching back to the purchase.

7. Ask the assessor how they sequence the correction. A claim takes time to process, and the assessor may record your purchase price as the new base year value before your claim is granted. Your county's office can tell you what that looks like on their schedule and what happens to the assessment afterward. Asking in the first month means you know what to expect from the bills that arrive in the meantime, rather than working it out after one of them surprises you.

Where does this go wrong?

Assuming the old county rule still applies. Somebody who researched this before Proposition 19 took effect may still believe they are locked into their own county, and that belief has kept people from looking at homes they could have bought.

Treating the two-year window as a formality. It runs from the sale of the original home, so a sale that happens before you have any idea what you want to buy spends part of it immediately. Two years disappears faster than it sounds when you are waiting on a specific home in a specific area.

Forgetting that the claim is yours to file. Nothing in a closing package starts this. The escrow officer does not file it, the title company does not file it, and your lender does not file it. It is a claim you make to the county assessor after you own the replacement home.

Letting the escrow account get built on the wrong number. The monthly tax collected in your payment is set from an estimate before anyone knows the final assessment. If that estimate came from the purchase price and your base ends up being transferred, the account will over-collect until a servicer runs an escrow analysis and corrects it. That is recoverable, and it is still your cash tied up for a while.

Spending a transfer without meaning to. You only get three of these in a lifetime, and a move you make at 56 and then undo at 60 uses one of them. The state keeps the count, so it is worth knowing where you stand before you treat a transfer as something you can spend casually.

An example, with invented numbers

Numbers below are made up to show the mechanism. They are not a quote, not a prediction, and not an estimate for any address or county.

A homeowner is 62. She bought her home a long time ago, and the taxable value on the current roll is $240,000. She sells it for a full cash value of $900,000. She buys a single-story replacement closer to her daughter for a full cash value of $1,050,000, eleven months after the sale.

The replacement costs more, so the difference gets added:

Taxable value of the home sold       $240,000
Plus replacement full cash value   $1,050,000
Less original full cash value        $900,000
New base year value                  $390,000

Assume a combined tax rate of 1.15%, which in a real county would be the one percent constitutional limit plus local voter-approved debt, and would be the county's number rather than mine.

WITHOUT THE TRANSFER
$1,050,000 x 1.15%                    $12,075 a year
                                       $1,006 a month

WITH THE TRANSFER
$390,000 x 1.15%                       $4,485 a year
                                         $374 a month

Difference                               $632 a month

Six hundred dollars a month, on a purchase where she moved up by $150,000 in value. It is the largest single line in her comparison, it has nothing to do with her interest rate, and it is available only because she filed a claim that nobody at the closing table was responsible for filing.

If the same person were 54 rather than 62, she would be buying the same home at the same price in the same county. She would also be paying the full $1,006 a month in tax, because none of this would be available to her yet. The arithmetic of moving up works the same way whichever side of 55 you are on, and in California it is the tax line that changes the answer.

Where to start

Run your numbers with no credit pull, no account, and nobody calling you. Rates priced for your scenario and your debt ratio, and closing costs priced for California rather than a national average. If you expect to carry a base year value, put that monthly tax figure in rather than the default one and see what the payment actually looks like.

When you are ready to make an offer a seller will take seriously, get pre-approved for a California mortgage and the income, debts and credit get reviewed properly rather than estimated.

Nothing here is a loan approval, a denial, a commitment to lend, or tax or legal advice. Eligibility for a base year value transfer, the taxable values involved, the filing requirements and the tax rate for a specific parcel are all determined under California law by the county assessor and tax collector for that property. Please confirm them with those offices and with your own tax adviser rather than assuming. No letter from anyone is a loan commitment, and final approval depends on the property, the appraisal and full underwriting.

Common questions

Can I transfer my California property tax base to a new home if I am over 55?

Yes, if both homes are your principal residence and you file the claim. Proposition 19 allows a homeowner who is at least 55 years old to transfer the taxable base year value of a principal residence to a replacement principal residence anywhere in California. The home you sold has to have been eligible for the homeowners' exemption or the disabled veterans' exemption, and the replacement has to become your principal residence. The same provision covers a homeowner who is severely and permanently disabled, and a homeowner whose home was destroyed or substantially damaged in a wildfire or other declared disaster. The claim goes to the county assessor where the replacement home is located, on form BOE-19-B.

How many times can I transfer my property tax base under Proposition 19?

Up to three times. The California State Board of Equalization describes the three-transfer limit for homeowners at least 55 years old or severely and permanently disabled, and says Social Security numbers are used to verify eligibility and to prevent more than three transfers. That means the count follows the person rather than the county, so a transfer taken in one part of the state is visible when a later claim is filed somewhere else. Transfers made by a homeowner whose home was destroyed in a declared disaster are treated separately from that limit. If you used a base year value transfer under the older rules, please ask your county assessor how it counts against yours before you plan around a third one.

What happens if my replacement home costs more than the one I sold?

The transfer still works, and the difference gets added. Where the replacement's full cash value is greater than the original's, the Board of Equalization adds the difference between the two full cash values to the transferred taxable value. That sum becomes the new base year value on the replacement. In practice you are taxed on your old number plus the step up between the two homes, rather than on the full purchase price. A homeowner moving up in value keeps most of the benefit instead of losing all of it.

How long do I have to buy the replacement home?

Two years. The replacement primary residence has to be purchased or newly constructed within two years of the sale of the original primary residence. The Board of Equalization also treats the original as qualifying where it was your principal residence either at the time of its sale or within two years of the purchase of the replacement. That gives the sequence some room in both directions. Two years is still a real date, and a sale that happens before you have started looking spends part of it.

When do I file the claim, and does anyone file it for me?

You file it yourself, and the deadline is three years from the date the replacement was purchased or its new construction was completed. The form is BOE-19-B and it goes to the county assessor where the replacement home is located. Nobody at your closing files it, and no part of a purchase transaction starts it automatically. If the claim is filed after the three-year window, relief can still be granted going forward, beginning with the year the claim is filed, rather than being applied back to the purchase date.

Does the transfer still work if I buy in a different California county?

Yes. Under Proposition 19 the base year value transfer is statewide, so you may sell in one county and buy in another. This is a change from the older rules, where an intercounty transfer generally depended on the receiving county having adopted an ordinance to accept them, and where many counties had not. Anyone who looked into this before the current rules took effect and concluded they were tied to their own county is working from the previous version. The claim is filed with the assessor in the county where the replacement home is.