In 2025, 64% of Manhattan co-op and condo sales closed without a mortgage, and the paperwork that most often stalls those purchases is not the offer. It is a deposit nobody can explain. Proof of funds and source of funds sound like the same thing. They are two different documents, prepared for two different audiences, at two different moments in the deal, and treating them as one is the most common self-inflicted delay I see on the cash side.
I have been licensed since November 2001 with more than 1,100 transactions tracked across the five boroughs. The pattern almost never changes: the buyer has the money, the money is entirely legitimate, and the file still sits for three weeks because a wire landed in February with no paper behind it. That is a documentation problem, not a money problem, and it is avoidable before you ever make an offer.
Two documents, two audiences
| Question | Proof of funds | Source of funds |
|---|---|---|
| Who reads it | The listing agent and the seller | The co-op board, and the bank if you finance later |
| When | With the offer, sometimes before a second showing | In the board package, weeks after the contract is signed |
| What it answers | Do you have the money right now? | Where did it come from, and is it staying? |
| Format | A current statement or bank letter, one page | Statements over several months plus a written explanation of anything unusual |
| What kills it | A screenshot, a stale date, a name that does not match the buyer | An unexplained deposit, or an account that empties right after closing |
Clearing the first one is easy. Clearing the second one is where cash purchases actually get decided, because a co-op board is not only asking whether you can close. It is asking whether you can keep paying maintenance for years afterward.
What a proof of funds letter has to contain
- The buyer's legal name, matching the name that will appear on the contract. If you are purchasing through an entity or a trust, the account name and the purchaser name need to reconcile, and you should expect to be asked how.
- A current date. Most listing agents treat anything older than 30 days as stale.
- An available balance at or above your offer plus closing costs, not your net worth. Retirement accounts and home equity are not available funds.
- The institution's name, on its letterhead or in a statement it generated. A spreadsheet, a screenshot, or a portfolio summary you exported yourself carries almost no weight.
If your money is in brokerage rather than cash, say so and show it. A seller weighing two offers will discount anything they cannot verify quickly, and "I will liquidate when we go to contract" reads as a contingency even when it is not one. The all-cash buying guide covers how that certainty converts into price, and where it does not.
The unexplained deposit
This is the single most common delay. A large, round, recent transfer appears in an account with nothing next to it explaining what it was. Nobody suspects wrongdoing. The reviewer simply cannot sign off on a number they cannot trace, so the file stops.
The fix is documentation prepared in advance, not after the question arrives. For any deposit that is large relative to the account's normal activity, have a one-paragraph written explanation and the underlying record ready: the closing statement from a property you sold, the bonus letter, the settlement agreement, the trust distribution notice, the sale-of-business documents. Two months of clean statements on either side of the deposit is the usual expectation, though a co-op board is free to ask for more and some ask for a year.
Where the money came from changes what you have to show
- A gift from family. Expect a signed gift letter stating the amount, the giver, and that repayment is not expected, plus evidence the funds actually left the giver's account. The documentation set is in gifting a NYC down payment.
- Money arriving from outside the US. Wire origin, currency conversion, and the sending institution all get looked at, and a co-op board may decline a buyer with no domestic financial history regardless of balance. See the foreign buyers guide.
- An entity or a trust is purchasing. The individuals behind it get named. New York has required an LLC buying a one-to-four-family residential property to disclose its members on the transfer tax return since 2019. See buying through an LLC or trust.
- An inheritance. The estate paperwork is the explanation. Keep the letters testamentary and the distribution record with the statement.
Active NYC Co-op Listings
The property type where the source-of-funds review actually bites
201 E 25TH Street #10D
Kips Bay
10 Park Avenue #5K
Murray Hill
Listing information provided courtesy of the Real Estate Board of New York's Residential Listing Service (RLS). Information is deemed reliable but not guaranteed. Sale listings verified. ©2026 REBNY. RLS data displayed by Keller Williams NYC.
What the board wants that the seller does not
A seller stops caring the moment the deal closes. A co-op board is choosing a neighbor who has to keep paying. That is why the board package asks for a full financial picture rather than a single balance, and why paying cash does not shorten it. Boards commonly look for a housing burden near 25% to 30% of gross income and one to two years of post-closing liquidity, which means a buyer who drains every account to close in cash can clear the purchase and fail the review.
The form that carries all of this is the REBNY financial statement, and the rest of the submission is laid out in the board package checklist. Fill the statement out as of a date you can support with attached statements, and make sure the closing figure on it is what will still be there after the wire goes out.
The federal reporting rule, and where it stands
You may have read that every all-cash purchase through an LLC or a trust now gets reported to the federal government. That rule existed, and right now it is not in force. FinCEN's Residential Real Estate Rule took effect for closings on or after March 1, 2026. On March 19, 2026, in Flowers Title Companies, LLC v. Bessent in the Eastern District of Texas, the court held that the rule exceeded FinCEN's authority and vacated it nationwide. The government appealed to the Fifth Circuit and filed its opening brief on August 17, 2026. No stay has been granted, so while that order stands, reporting persons are not required to file and face no liability for not filing.
Treat that as a live question rather than a settled one. A separate appeal is pending in the Eleventh Circuit and the courts have split on the underlying authority, which is the usual road to Supreme Court review. Ask your attorney where it stands at the time you sign a contract rather than relying on where it stood when you read this.
Pre-clear it before you offer
- Consolidate early. If the purchase money sits across five accounts, move it into one well before you bid. Every transfer you make during the deal is another line someone has to trace.
- Write the explanations now. One paragraph per unusual deposit, with the supporting document attached. It takes an afternoon and saves weeks.
- Check the name. Account name, contract name, and entity name should reconcile before the offer, not at the board package.
- Keep the reserve visible. Show the board what remains after closing, because that number is what they are actually underwriting.
- Date everything close to submission. A statement from four months ago invites a request for a newer one.
Everything on this site about cash, gifts, trusts, and inherited money
Open the SectionBuying in cash and want the file clean before you bid?
Milton Coste, Licensed Real Estate Associate Broker, licensed since November 2001 with more than 1,100 transactions across all five boroughs. Tell me where the money is sitting and I will tell you what the building will ask for.
Ask MiltonThis is planning context, not legal, tax, or financial advice. Board requirements are set by each cooperative corporation and vary widely, and lender documentation standards vary by program. The market figure cited is historical, from the Douglas Elliman fourth-quarter 2025 Manhattan report as reported by The New York Times in January 2026, and is not a prediction. The status of the FinCEN Residential Real Estate Rule is as of August 20, 2026 and is under appeal. Confirm your own position with a New York real estate attorney before signing a contract.
Sources
Primary sources for the figures on this page, verified August 21, 2026.
- New York State Publication 577, mansion tax, part of the cash a buyer must show
- NYC Department of Finance, property taxes, the carrying costs a board underwrites
