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National guides quote closing costs as a percentage of the price. In California that figure is close to meaningless, for three reasons that are specific to this state: transfer tax is set at up to three different levels, who pays it is decided by county custom rather than by law, and the single largest surprise arrives months after closing.
This page sets out each component, what determines it, and which ones are negotiable. Where a number is fixed by statute or ordinance it is given; where it varies by lender or city, you are told what to ask rather than given an average that would mislead you.
One trap worth knowing if you are restructuring rather than selling: the state and county tax has exemptions covering certain transfers into trusts and between spouses, and the City of Los Angeles does not recognize those exemptions for ULA. A transfer that is exempt at state level can still attract the city tax. Take advice before the transfer.
Under Proposition 13 a sale is a change of ownership, so the property is reassessed to market value. Your tax is based on what you paid, not on the seller's assessment, which on a long-held home may be anchored to a value from decades ago. That much most buyers eventually discover.
What they do not expect is the supplemental bill: a separate bill covering the difference between the old assessment and the new one for the remainder of the tax year. It arrives on its own timetable, often months after you have moved in, and it does not look like the regular bill. Close between roughly January and May and you may receive two of them, because the change spans two tax years. Set the money aside at closing rather than being surprised by it.
More than most buyers assume. Because who pays transfer tax and each title policy is custom rather than statute, all of it is on the table. Lender fees differ between lenders for an identical loan. And where a seller has room, a credit toward closing costs is often easier to agree than a price reduction, since it does not move the comparable sale that the next appraiser will look at.
There are up to three layers and people usually only know about one. The county documentary transfer tax is set by Revenue & Taxation Code 11911 at $0.55 per $500 of the price — 0.11%. On top of that, charter cities may levy their own, and those vary enormously. And in the City of Los Angeles, Measure ULA adds 4% on sales above roughly $5.3 million and 5.5% above roughly $10.6 million, on the entire price rather than the excess, and in addition to the existing combined city and county rate of about 0.56%. Those ULA thresholds are inflation-adjusted annually — they rose on 1 July 2025 — so confirm the current figures before relying on them.
There is no statewide rule, which is why national guides get this wrong. It is decided by local custom and is negotiable in every transaction. Broadly, in much of Southern California the seller customarily pays the county transfer tax, while in parts of Northern California the split differs and in some counties the buyer pays. City transfer taxes have their own customs again. Ask your escrow officer what is customary in that specific county, then treat it as a negotiating point rather than a fixed cost — in a slow market it moves.
Not necessarily in the way you would expect, and this catches people. California's state-law documentary transfer tax has a set of exemptions, including certain transfers into trusts and between spouses. The City of Los Angeles does not recognize those state-law exemptions for its own ULA tax. So a transfer that is exempt from the state and county tax can still attract ULA. If the amount is significant, this is a question for a California real estate attorney before the transfer, not after.
Because there are two bills, and almost nobody budgets for the second. Under Proposition 13 a sale is a change of ownership, so the property is reassessed to market value — your value, not the seller's, which may have been anchored decades ago. The regular annual bill is then joined by a supplemental bill covering the difference between the old assessment and the new one for the remainder of the tax year. It arrives separately, often months after closing, and it does not look like the regular bill. If you closed between roughly January and May you may receive two supplemental bills rather than one, because the change spans two tax years.
California closes through escrow rather than through attorneys. The escrow holder is a neutral third party that holds the funds and the documents and follows the parties' joint instructions; the title company searches title and issues the policies. Neither represents you, and neither is responsible for whether your disclosures are adequate. You are not required to use a lawyer, and most transactions do not. If you are selling without an agent, budget for one to review the purchase agreement and the disclosure package anyway — it is a fraction of a commission and it covers the part where the liability actually sits.
Because they protect two different people. The lender's policy protects the lender's interest in the property, for the amount of the loan, and is required if you are borrowing. The owner's policy protects you, for the purchase price, against defects in title that the search did not surface — a forged signature in the chain, an undisclosed heir, a recording error. Only one of those two protects you, and the owner's policy is the one buyers occasionally decline to save money. Who customarily pays for which again varies by county.
In rough order of how often they are missed: the supplemental property tax bill; prepaid interest from closing to the end of the month; the impound account, where the lender collects several months of tax and insurance up front; HOA transfer and document fees, which for a common interest development can be substantial and are set by the association; the natural hazard disclosure report; and, in fire-exposed areas, an insurance premium several times what a buyer moving from another state has budgeted for. The last one is not a closing cost, but it changes affordability more than any of the others.
More than most buyers realise. Lender fees vary between lenders for the same loan, and a written loan estimate from two or three of them is the cheapest comparison available. Who pays which transfer tax and title policy is custom rather than law, so it is negotiable. And in a market with room, a seller credit toward closing costs is often easier to agree than a price reduction, because it does not affect the comparable sales the appraiser will use.
Closing costs are the one-off part. For the ongoing side — what you can genuinely afford each month — and if the property is anywhere near wildland, check the fire zone and insurance position before you rely on any premium estimate.
General information, not legal or tax advice. Transfer tax rates, thresholds and exemptions are set by statute and by city ordinance and do change — confirm the current position for your city and county, and take advice on any transfer that is not a straightforward sale.