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ClaudeMortgageBeginnerGuide

Claude CoWork for Mortgage Brokers

A practical guide to using Claude as your AI co-worker in your mortgage workflow — from setup to daily use.

Claude CoWork for Mortgage Brokers

What is Claude CoWork?

Claude CoWork is the practice of using Claude as a dedicated, context-aware assistant that plugs directly into your mortgage brokerage workflow. Instead of starting from scratch every time you open a chat window, you configure Claude with your practice context, communication preferences, and compliance standards so it consistently produces output that is useful from the first draft.

Claude-native prompts. The prompts in this guide use Claude's native XML tag structure (<context>, <instructions>, <format>, <avoid>) for more precise, consistent output. These tags help Claude parse your intent with less ambiguity. They work in ChatGPT too, but are optimized for Claude.

Mortgage brokers juggle an extraordinary volume of client communication, compliance documentation, and analytical work. Pre-approval letters that need to be accurate and timely. Rate comparison summaries that translate complex loan products into clear client decisions. Client update emails that keep borrowers informed without creating liability. Refinance analyses that balance numbers with strategy. Marketing content that generates leads while staying compliant. These tasks are essential but repetitive, and they are exactly where Claude adds the most value.

This guide shows you how to configure Claude for mortgage-specific work, the five workflows that will reclaim the most time in your day, and the compliance guardrails that are non-negotiable in a regulated lending environment.

Install the Mortgage Broker Plugin

This guide works on three Claude surfaces. The plugin is the fastest path on two of them. Pick whichever you use:

If you're on Cowork (desktop or mobile app)

Claude Cowork is Anthropic's agentic workspace — Claude completes work autonomously and returns finished deliverables. The Mortgage Broker plugin packages the workflows below as native skills and slash commands.

  1. Open the Cowork plugin directory in your desktop app.
  2. Filter by Cowork, search for "Mortgage Broker", and click Install.
  3. The plugin's slash commands and ambient skills are now available in any Cowork task.

If you don't see the plugin in the directory yet, install via custom marketplace: paste https://github.com/alexclowe/awesome-claude-cowork-plugins in your Cowork plugin settings.

If you're on Claude Code (CLI)

Install from your terminal:

claude plugin add alexclowe/awesome-claude-cowork-plugins/mortgage-broker

The plugin's slash commands and skills load on next session.

If you're on Claude.ai (web chat only)

Plugins aren't directly installable on the web chat surface. You have two options:

  1. Use the prompts in this guide directly in a Claude Project (covered in the next section). Same outputs, more typing.
  2. Upload the plugin's skills as a zip via Settings → Features → Custom Skills (Pro/Max/Team/Enterprise plans). Higher friction; only worth it if you want the auto-activating skills, not the slash commands.

What the plugin gives you (any surface)

Slash command What it does
/rate-comparison Generate side-by-side rate, APR, and fee comparisons across multiple loan products
/pre-approval-letter Draft professional pre-approval letters with qualifying language and borrower-specific details
/client-update Create clear pipeline status updates for borrowers at each stage of the loan process
/refinance-analysis Build break-even analyses comparing current and proposed loan terms with savings projections

Auto-activating skills (no command needed — Claude applies them when relevant):

  • Mortgage Lending — Rate structures, loan programs, fee schedules, regulatory compliance, and underwriting requirements
  • Client Communication — Clear borrower-facing language, status updates, expectation management, and compliant disclosures

The plugin works standalone for one-off tasks. Pair it with the surface-specific setup below for persistent context across every task — that combination is the full Claude CoWork setup.

Setting Up Claude for Mortgage Work

Surface note: The Project setup below is for claude.ai web users. Cowork users have their own task-context mechanism (set context once when starting a Cowork task). Claude Code users get the plugin's ambient skills automatically — no Project setup needed. The workflows themselves are surface-agnostic — paste the prompts wherever you're working. Step 1: Create a Mortgage Project. In Claude, go to Projects and create one called "Mortgage Practice" or similar. This is your persistent workspace with context that carries across conversations.

Step 2: Set your custom instructions. In the Project settings, add:

You are my mortgage brokerage documentation and communication assistant. Here is my context:

<practice-profile>
- Role: [Licensed Mortgage Broker / Loan Officer / Branch Manager]
- NMLS#: [Do NOT include — reference only that you are licensed]
- State(s) licensed: [Your State(s)]
- Primary lenders: [List your top 5-8 wholesale lenders]
- Specialties: [Conventional / FHA / VA / USDA / Jumbo / Non-QM / Investment property / First-time buyers]
- LOS system: [Encompass, Calyx, BytePro, etc.]
- Target market: [First-time homebuyers / Move-up buyers / Refinance / Investors / Self-employed]
</practice-profile>

<rules>
- All rate references must include a disclaimer that rates are subject to change and based on individual qualification
- Never guarantee loan approval, specific rates, or closing costs in any client-facing communication
- All marketing content must comply with TILA, RESPA, and Regulation Z advertising requirements
- Include Equal Housing Lender language where appropriate
- Client communications should be professional, clear, and free of misleading claims
- Never generate content that includes real client financial information — all scenarios must use hypothetical examples
- Remind me to verify all rates, fees, and loan details against current lender rate sheets before sending
</rules>

Step 3: Upload your templates. Add your preferred pre-approval letter template, your rate sheet comparison format, any lender-specific guidelines you reference frequently, and your standard client communication templates.

Step 4: Always work inside this Project. Every new conversation inherits your context automatically.

Your Top 5 Workflows with Claude

1. Pre-Approval Letters

Pre-approval letters need to be professional, accurate, and turned around quickly. Claude drafts letters from your underwriting data so you can review and send faster.

<task>Draft a pre-approval letter for a hypothetical borrower scenario.</task>

<context>
- Borrower profile: Married couple, combined annual income $145,000, FICO scores 740/725
- Pre-approved amount: Up to $425,000
- Loan program: Conventional 30-year fixed
- Down payment: 10% ($42,500)
- Conditions: Subject to property appraisal, title review, and full underwriting
- Letter recipient: Listing agent for property at [Address TBD]
- Expiration: 90 days from issue date
</context>

<instructions>
Draft a professional pre-approval letter that includes:
- Borrower qualification summary (income and credit reviewed, not specific numbers)
- Pre-approved purchase price
- Loan type and general terms
- Standard conditions and contingencies
- Your contact information placeholder
- Professional tone that instills confidence in the listing agent

Keep it to one page. The letter should convey financial strength without disclosing unnecessary borrower details.
</instructions>

<avoid>Specific income figures, exact credit scores, guaranteeing final approval, language that could be construed as a loan commitment.</avoid>

Before Claude: 10-15 minutes drafting each pre-approval letter. After Claude: 2 minutes to input details, 3 minutes to review and customize.

2. Rate Comparison Summaries

Clients need to understand their loan options without drowning in numbers. Claude creates clear comparison documents from your rate sheet data.

<task>Create a rate comparison summary for a hypothetical client evaluating loan options.</task>

<context>
- Scenario: First-time homebuyer, purchase price $375,000
- Credit profile: 720 FICO, 5% down, W-2 employed
- Options to compare:
  1. Conventional 30-year fixed: 6.875%, 0 points, PMI $185/mo, estimated closing costs $8,200
  2. Conventional 30-year fixed: 6.5%, 1.25 points ($4,453 buydown), PMI $185/mo, estimated closing costs $12,653
  3. FHA 30-year fixed: 6.25%, 0 points, MIP upfront 1.75% + monthly $195/mo, estimated closing costs $9,800
- Client priorities: Lowest monthly payment, plans to stay 7+ years
</context>

<instructions>
Create a comparison summary that includes:
- A side-by-side table with monthly P&I, PMI/MIP, total monthly payment, total closing costs, and break-even point for the buydown option
- A brief narrative explaining which option makes the most sense given their stated priorities and timeline
- A "Key Considerations" section covering PMI removal (conventional at 80% LTV vs. FHA MIP for life of loan), the buydown break-even calculation, and total cost of each loan over 7 years
- A clear disclaimer that all rates and figures are estimates subject to change

Write for someone who does not work in finance. Explain terms briefly where needed.
</instructions>

<avoid>Guaranteeing any specific rate, omitting the rate disclaimer, recommending one option as definitively "best" without caveats, using real client data.</avoid>

Before Claude: 20-30 minutes building a comparison spreadsheet and writing the explanation. After Claude: 5 minutes to input rate data, 5 minutes to review and send.

3. Client Update Emails

Keeping borrowers informed throughout the loan process reduces anxiety and call volume. Claude drafts status updates for every stage.

<task>Draft a client update email for a borrower whose loan is in underwriting.</task>

<context>
- Loan stage: Submitted to underwriting, day 3 of estimated 5-7 business day review
- Loan type: Conventional purchase, 30-year fixed
- Property: Under contract, appraisal completed and came in at value
- Outstanding items: None from borrower at this time
- Expected next step: Conditional approval anticipated within 2-4 business days
- Closing target: 3 weeks from today
</context>

<instructions>
Draft a professional, reassuring client email that includes:
- Current loan status in plain language
- Confirmation that appraisal came back clean
- What is happening now (underwriting review) and expected timeline
- What they might need to provide if conditions come back (prepare them without alarming them)
- Reminder not to make major purchases, open new credit, or change jobs
- Your availability for questions

Tone should be confident, proactive, and calming. Clients in underwriting tend to be anxious.
</instructions>

<avoid>Guaranteeing approval, specific closing date promises, implying the deal is done before clear-to-close.</avoid>

Before Claude: 8-12 minutes per update email, multiplied across your pipeline. After Claude: 2 minutes to input status, 2 minutes to review and send.

4. Refinance Analyses

Clients considering a refinance need a clear picture of whether the numbers work. Claude structures the analysis from your data into a client-ready document.

<task>Create a refinance analysis for a hypothetical homeowner scenario.</task>

<context>
- Current loan: $320,000 balance, 7.25% rate, 30-year fixed, originated 2 years ago, current payment $2,183 P&I
- Home value: $410,000 (estimated, pending appraisal)
- Current LTV: 78%
- Credit: 755 FICO
- Refinance option: 30-year fixed at 6.125%, estimated closing costs $6,800 (can be rolled into loan)
- Client goal: Lower monthly payment, considering cash-out for kitchen renovation ($30,000)
</context>

<instructions>
Create a refinance analysis that includes:
- Rate-and-term refi: New payment, monthly savings, break-even point on closing costs, total interest savings over remaining loan term
- Cash-out refi ($30,000): New loan amount, new payment, net monthly change, new LTV, and whether PMI would apply
- Side-by-side comparison table
- A "Should You Refinance?" section that addresses their break-even timeline, how long they plan to stay, and the trade-off of resetting to a new 30-year term
- Clear disclaimer that all figures are estimates pending appraisal and full underwriting

Write for a homeowner audience, not a loan officer audience.
</instructions>

<avoid>Guaranteeing rates or approval, omitting the estimate disclaimer, advising on home improvement decisions, using real client data.</avoid>

Before Claude: 25-35 minutes building the analysis and writing the client explanation. After Claude: 5 minutes to input loan data, 5 minutes to review and customize.

5. Marketing Content

Consistent marketing drives your pipeline. Claude generates compliant content for email campaigns, social media, and educational posts.

<task>Create a series of 4 social media posts about first-time homebuyer tips.</task>

<context>
- Platform: LinkedIn and Instagram (adapt tone for each)
- Target audience: First-time homebuyers, ages 28-40, in [State/Region]
- Brand voice: Knowledgeable, approachable, not salesy
- Goal: Educate and build trust, drive DMs or website visits
- Compliance requirement: TILA/RESPA compliant, Equal Housing Lender mention
</context>

<instructions>
Create 4 posts, each covering a different topic:
1. Why getting pre-approved before house hunting matters
2. Down payment myths (you do not always need 20%)
3. What to expect during underwriting (demystify the process)
4. Closing costs explained in plain language

Each post should:
- Be 150-200 words for LinkedIn, with a shorter Instagram caption version (80-120 words)
- Include a hook in the first line
- End with a soft call-to-action (DM me, link in bio, etc.)
- Include the Equal Housing Lender statement or NMLS placeholder where appropriate

Tone: Educational, conversational, trustworthy. Not hype or pressure.
</instructions>

<avoid>Quoting specific rates without disclaimer, promising approval, using "guaranteed" or "lowest rates" language, making income claims, violating fair lending language standards.</avoid>

Before Claude: 45-60 minutes writing a week's worth of social content. After Claude: 5 minutes to specify topics, 10 minutes to review, customize, and schedule.

Prompt Engineering Tips for Mortgage Brokers

1. Always specify the loan program. "Conventional 30-year fixed" versus "FHA" versus "VA" changes everything about the content Claude generates. Loan-specific language, requirements, and disclaimers vary significantly across programs.

2. Include the compliance framework. Adding "TILA/RESPA compliant" or "Regulation Z advertising standards" to your prompt reminds Claude to include required disclaimers and avoid prohibited language. Build this into your Project instructions.

3. State the audience explicitly. A rate comparison for a financially savvy investor reads completely differently than one for a first-time buyer. Always tell Claude who will read the document.

4. Provide the numbers, let Claude frame them. Claude excels at taking raw rate data, closing costs, and payment figures and turning them into clear, client-friendly explanations. You provide accuracy; Claude provides clarity.

5. Ask Claude to flag compliance risks. Paste any client-facing content and ask: "Review this for TILA/RESPA compliance issues, misleading claims, or missing disclaimers." This is a fast compliance pre-check before anything goes out the door.

6. Use Claude to draft multiple versions. Say "Give me 3 versions of this email — one for a first-time buyer, one for a move-up buyer, and one for a refinance client" to build your template library faster.

Privacy & Compliance

Never input real client financial data. Do not enter actual income figures, Social Security numbers, account numbers, credit scores tied to real individuals, or any personally identifiable financial information into Claude. Use hypothetical scenarios for all document drafting.

TILA/RESPA compliance is non-negotiable. All client-facing communications, marketing materials, and rate disclosures must comply with the Truth in Lending Act and Real Estate Settlement Procedures Act. Claude can help structure compliant content, but you are responsible for verifying that every document meets federal and state regulatory requirements before distribution.

No guarantees on approval or rates. Claude-generated content must never guarantee loan approval, promise specific interest rates, or make binding commitments on closing costs. Every rate reference should include language indicating that rates are subject to change and based on individual qualification.

State lending law compliance. Mortgage regulations vary by state. Advertising requirements, disclosure language, and licensing display rules differ across jurisdictions. Always verify that Claude-generated content complies with the specific lending laws in every state where you operate.

Claude drafts, you verify. Every letter, analysis, and marketing post that Claude produces is a draft. Your review against current rate sheets, lender guidelines, and compliance requirements is what makes it ready to send. You are the licensed professional of record, not Claude.

Maintain your compliance records. If your compliance department or regulator requires documentation of marketing approval processes, note that AI-assisted drafting was used and that human review and approval occurred before distribution.

Going Further

Ready to take your mortgage business further with AI? Explore these resources:

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