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BUS-REAL58-03 · Lesson 4 · 16 clock hours · lab

Residential Purchase and Sale Agreements

Objective. Students will complete a residential purchase and sale agreement and at least two addenda for a simulated transaction, with all material terms accurate, all required signatures flagged, and all contingency deadlines correctly calculated.

⚠ Pending professional review

This lesson, its worked examples and its practice questions has not yet been verified by a credentialed professional in the field or by a certification or approval body. It is a study draft and may contain errors. Do not use it as instructions for work on a job site or on live equipment. Always follow your instructor, your supervising professional, and current official references and regulations.

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Why the Purchase and Sale Agreement Matters

The residential purchase and sale agreement (PSA) is the binding contract that transfers the right to buy a home from a seller to a buyer. Every material term of the deal — price, earnest money, financing, inspection rights, and the closing date — lives in this document. An error in any of those terms can expose a buyer, seller, or agent to financial loss or litigation. For the State Real Estate Salesperson License exam and for daily practice, you must be able to read, complete, and explain every section of the PSA accurately.

The Core Sections of a Residential PSA

Parties and Property Identification. The agreement identifies the buyer(s), the seller(s), and the property by its legal description and common address. Names must match government-issued identification. The legal description — typically a lot-and-block number or a metes-and-bounds description from the deed — must be copied exactly. A wrong legal description can cloud title.

Purchase Price and Earnest Money. The purchase price is the total agreed consideration. Earnest money (also called a good-faith deposit) is a portion of that price paid by the buyer promptly after acceptance to demonstrate serious intent. The PSA must state the earnest money amount, the form of payment, and who holds it (usually a licensed escrow holder or the listing broker's trust account). Earnest money is not an extra payment; it is credited toward the purchase price at closing.

Financing Terms. If the buyer needs a loan, the PSA states the loan type (conventional, FHA, VA, etc.), the maximum interest rate acceptable to the buyer, and the loan amount. These figures trigger the financing contingency, which protects the buyer if the loan cannot be obtained.

Contingencies and Deadlines. Contingencies are conditions that must be met before the contract becomes fully binding. The three most common are:

Deadline dates are typically calculated as calendar days from mutual acceptance (the date and time the last party signs and communicates acceptance). Count day one as the day after mutual acceptance unless the form specifies otherwise. If a deadline falls on a Saturday, Sunday, or federal holiday, most standard forms extend it to the next business day — always check the specific form language.

Closing Date. The closing date is the date on which ownership transfers, funds are disbursed, and the deed is recorded. It must be realistic given the financing and inspection timelines. A typical residential closing occurs 30 to 45 days after mutual acceptance, but this varies.

Possession. The agreement states when the buyer takes physical possession — at closing, at recording, or at some agreed date after closing.

Addenda

Addenda are separate forms that modify or supplement the PSA. They must reference the PSA by property address and date, be signed by all parties, and be physically attached to the PSA in the file. Common addenda include:

Only attach addenda that apply to your specific scenario. A mismatch between the PSA terms and an addendum creates ambiguity that can void provisions.

Accuracy and Professionalism: The Safety Rules of Contract Work

In real estate, accuracy is a safety issue for clients' finances and legal standing. Apply these discipline rules every time:

Building the Transaction Timeline

After the PSA is signed, map every deadline on a calendar. Write the mutual acceptance date first, then count forward for each contingency period. Write the deadline date — not just the number of days — on your chart. Verify each date twice. This timeline becomes your working checklist throughout the transaction and protects both parties from inadvertently waiving a contingency by missing a deadline.

Key terms10

Purchase and Sale Agreement (PSA)The legally binding contract between buyer and seller that establishes all material terms of a real estate transaction, including price, earnest money, contingencies, and closing date.
Earnest MoneyA good-faith deposit made by the buyer at the time of offer or acceptance; credited toward the purchase price at closing and typically held in a licensed escrow or trust account.
Mutual AcceptanceThe date and time on which the last party signs and communicates acceptance of the contract, starting the clock for all contingency deadlines.
ContingencyA condition written into the PSA that must be satisfied within a stated deadline for the contract to remain binding; failure to satisfy a contingency may allow cancellation without penalty.
Inspection ContingencyA contract provision giving the buyer a defined period to have the property professionally inspected and to negotiate repairs or cancel the contract based on findings.
Financing ContingencyA contract provision that makes the purchase conditional on the buyer obtaining a satisfactory loan commitment within a specified number of days.
Lead-Based Paint DisclosureA federally required disclosure and addendum for homes built before 1978 in which the seller must reveal known lead-based paint hazards and the buyer is afforded an inspection period.
AddendumA separate, signed form that modifies or supplements the PSA; must reference the original contract and be attached to it to be enforceable.
Legal DescriptionThe precise, government-recorded description of a parcel of land (such as lot and block or metes and bounds) used in contracts and deeds to identify property without ambiguity.
Closing DateThe contractually agreed date on which the deed is recorded, funds are disbursed, and ownership of the property legally transfers from seller to buyer.

Worked examples4

1. Mutual acceptance occurs on Monday, March 3. The PSA states the inspection contingency period is 10 calendar days. On what date does the inspection contingency expire?
  1. Identify mutual acceptance date: Monday, March 3.
  2. The standard form starts counting day 1 as the day after mutual acceptance, so day 1 is Tuesday, March 4.
  3. Count 10 calendar days forward: March 4 (1), 5 (2), 6 (3), 7 (4), 8 (5), 9 (6), 10 (7), 11 (8), 12 (9), 13 (10).
  4. March 13 is a Thursday — not a weekend or federal holiday — so no extension is needed.
  5. The inspection contingency expires on Thursday, March 13.
Answer: Thursday, March 13.
2. The purchase price is $325,000. The buyer pays 5% down and finances the remainder. What is the loan amount, and what is the earnest money if it equals 1% of the purchase price?
  1. Calculate the down payment: $325,000 × 0.05 = $16,250.
  2. Calculate the loan amount: $325,000 − $16,250 = $308,750.
  3. Calculate earnest money at 1%: $325,000 × 0.01 = $3,250.
  4. Confirm that earnest money ($3,250) is less than the down payment ($16,250) — this is standard; earnest money is credited toward the down payment at closing.
Answer: Loan amount: $308,750. Earnest money: $3,250.
3. Mutual acceptance is Friday, April 11. The financing contingency is 21 calendar days. April 11 falls in a month where April has 30 days. What is the financing contingency deadline? If that date is a Sunday, when does it actually expire under a standard form that extends to the next business day?
  1. Day 1 is the day after mutual acceptance: Saturday, April 12.
  2. Count 21 calendar days from April 12: April 12 (1) through April 30 (19), then May 1 (20), May 2 (21).
  3. The 21st day lands on Friday, May 2. Check: May 2, 2025 is a Friday — no extension needed in this calculation.
  4. Alternate check for the Sunday scenario as stated in the problem: if day 21 were Sunday, May 4, the standard form would extend the deadline to Monday, May 5 (assuming May 5 is not a federal holiday).
Answer: Financing contingency deadline: May 2 (a Friday, no extension). If it had fallen on Sunday, it would extend to Monday, May 5.
4. A transaction timeline has four deadlines: inspection (day 10), financing (day 21), appraisal (day 21), and closing (day 45). Mutual acceptance is Wednesday, June 4. List the calendar dates for all four deadlines.
  1. Day 1 = June 5 (Thursday).
  2. Inspection day 10: count 10 days from June 5 — June 5 (1), 6, 7, 8, 9, 10, 11, 12, 13, 14 (10) = June 14, Saturday. If the form extends to the next business day, deadline is Monday, June 16.
  3. Financing and appraisal day 21: count 21 days from June 5 — June 5 (1) through June 25 (21) = June 25, Wednesday. No extension needed.
  4. Closing day 45: count 45 days from June 5 — June 5 (1), through June 30 (26), then July 1 (27) through July 19 (45) = July 19, Saturday. Extend to Monday, July 21.
  5. Summarize: Inspection June 16 (extended from June 14), Financing/Appraisal June 25, Closing July 21 (extended from July 19).
Answer: Inspection: June 16; Financing and Appraisal: June 25; Closing: July 21.
In class: Lab setup: each student receives a detailed transaction scenario packet (buyer profile, property description, offer price, earnest money amount, financing terms, inspection period, closing date); students complete the full purchase and sale agreement independently using a current state form. · Contingency timeline mapping: using the executed purchase agreement, students build a paper-based transaction timeline chart marking every deadline (inspection, financing, appraisal, closing), then verify dates using a calendar calculation worksheet. · Addenda drafting: students select and complete two addenda from a set of options (financing contingency, inspection contingency, lead-based paint disclosure, home sale contingency) appropriate to their scenario and attach them correctly to the purchase agreement.
Materials: Current state residential purchase and sale agreement form, standard addenda set, transaction scenario packets, calendar calculation worksheet, ruler, pen, manila folders for file assembly
Check: Completed contract package graded on a 30-point rubric: purchase agreement accuracy (20 pts), addenda selection and completion (6 pts), timeline accuracy (4 pts); pass mark is 24/30 with no errors in purchase price, earnest money amount, or closing date.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

Real Estate Contracts
1. A buyer's offer is accepted at 3:00 PM on Tuesday. The inspection contingency is 10 calendar days, and the form states day one is the day after mutual acceptance. What is the last day of the inspection period if no deadlines fall on a weekend or holiday?
Real Estate Contracts
2. Which statement best describes earnest money in a residential purchase and sale agreement?
Federal Disclosure Requirements
3. A home was built in 1965. Which addendum is federally required to be included with the purchase and sale agreement?
License Law and Ethical Conduct
4. An agent adds a custom legal clause to a PSA at the buyer's request to alter the seller's warranty language. This action most likely constitutes:
Real Estate Contracts
5. The purchase price is $280,000 and the buyer places a 3% earnest money deposit. How much is the earnest money?
Real Estate Contracts
6. A financing contingency deadline falls on a Sunday. The PSA states deadlines falling on weekends extend to the next business day. Monday is a federal holiday. When does the financing contingency expire?
Real Estate Contracts
7. Which of the following items must be included in an addendum for it to be legally attached to and part of the purchase and sale agreement?
Property Ownership and Title
8. In a residential purchase and sale agreement, the legal description of the property is important because:
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