Sample Letter for Additional Work: Templates, Best Practices & Correct Usage Guide

Every contractor, freelancer or team lead has been there. You’re mid-project, the scope shifts, and you need to formally request extra work approval before proceeding. A messy verbal ask gets ignored, causes payment delays, and breaks trust with your client.

This is exactly where a properly written Sample Letter for Additional Work becomes your most valuable professional tool. In this guide, we’ll break down when to use this letter, share ready-to-use examples for every common scenario, and cover what to include to get fast, written approval.

Why A Formal Sample Letter For Additional Work Prevents Disputes

Most people skip formal documentation for extra work because it feels unnecessary. This is the number one cause of 62% of construction and freelance project payment disputes, according to industry data. Every single piece of additional work, no matter how small, requires written confirmation before you start work.

A good sample letter for additional work establishes three critical things upfront:

• Exact work being requested outside original scope
• Adjusted timeline and cost for the extra tasks
• Formal approval trail for accounting and records

Reference this table for what to include vs what to leave out:

Sample Letter for Additional Work: Construction Site Scope Change

Subject: Formal Request for Additional Work – Residential Build Project #412

Dear Mr Henderson,

During foundation excavation today, our team identified unmarked underground drainage that requires rerouting before we can proceed with slab pouring.

This work was not included in the original contract scope. We can complete this rerouting for $1,850, and it will add 2 working days to the project timeline. We can begin first thing tomorrow upon your written approval.

Please reply to confirm acceptance by 5pm today. Thank you for your prompt response.

Regards,
Marcus Torres
Site Foreman

Sample Letter for Additional Work: Freelance Design Extra Revisions

Subject: Request for Additional Work Approval – Brand Identity Project

Hi Sarah,

Thank you for sharing the updated brand requirements yesterday. The 3 extra logo variations and social media template set you have requested fall outside the original agreed deliverables.

I can complete this work for a flat fee of $720, with delivery within 3 working days. No other scheduled work will be delayed.

Let me know if you are happy to proceed with this additional scope.

Best,
Jade Mills
Graphic Designer

Sample Letter for Additional Work: Office Maintenance Extra Repairs

Subject: Additional Work Required – Office AC System Service

Dear Facilities Manager,

While completing the scheduled annual AC service today, our technician found a failing compressor motor on the 3rd floor unit. This part will fail completely within 14 days if not replaced.

Replacement parts and labour will cost $1,120. We have the part in stock and can install tomorrow if approved.

Please confirm approval at your earliest convenience.

Thank you,
Cool Air Services Team

Sample Letter for Additional Work: IT Project Extra Security Audit

Subject: Additional Work Request – CRM Migration Project

Hi David,

As we prepared for data migration this week, we identified that the new CRM requires a full security compliance audit before go-live, per company policy. This step was not included in the original project plan.

Our security team can complete this audit for $980, adding 1 working day to the launch timeline.

Please confirm we can proceed with this required work.

Regards,
Project Management Team

Sample Letter for Additional Work: Landscaping Extra Tree Removal

Subject: Additional Work Notice – Backyard Landscaping Contract

Dear Mrs Carter,

During our site assessment yesterday, we noted the large oak tree near the patio has advanced root rot. This tree presents a safety hazard and should be removed before we install the new patio surface.

We can safely remove and dispose of this tree for $1,400. This work will add 1 day to the project schedule.

Let us know how you would like to proceed.

Thanks,
Greenview Landscaping

Sample Letter for Additional Work: Event Planning Extra Staffing

Subject: Additional Work Request – Corporate Gala Event

Hi Lisa,

Following your update this morning that guest numbers have increased by 120 people, we will need to add 8 additional event staff and 3 extra bar stations for the gala.

This additional staffing and equipment will cost $2,100. All arrangements can be confirmed within 24 hours of approval.

Please confirm this additional scope by end of day today.

Best regards,
Premier Events

Sample Letter for Additional Work: Vehicle Repair Extra Parts

Subject: Additional Work Required – Vehicle Service Booking #7829

Dear Mr Lee,

While completing your scheduled brake service today, our mechanic found worn front suspension bushes that require immediate replacement for safe operation.

Parts and labour for this repair will cost $380. We can complete this work today and have your vehicle ready by 4pm if approved.

Please reply to confirm this additional work.

Thank you,
Northside Auto Workshop

Frequently Asked Questions about Sample Letter for Additional Work

When should I send a letter for additional work?

Send this letter immediately when you identify work outside the original agreed scope. Always send it before starting any extra work. Verbal approval should always be followed up with this written confirmation.

Do I need this letter even for small extra tasks?

Yes, even for work under $100 or less than one hour. Small unapproved tasks add up quickly on projects. This also creates a clear paper trail for all parties.

How long should I wait for approval?

Always state a clear reasonable deadline in your letter, usually 24 to 48 hours. For time critical work, you can request same day response. Never proceed without written confirmation.

Can I send this as an email instead of a printed letter?

Yes, email is the standard accepted format for this document today. Always send it to the authorised decision maker, and keep a copy of the sent email and reply.

What if the client refuses to approve the extra work?

Document the refusal clearly in writing. Do not complete the unapproved work. You can then proceed with only the originally contracted work as agreed.

Should I include cost breakdowns in the letter?

Always include clear, itemised costs for all additional work. Vague pricing will cause delays and distrust. Even for flat fee work, note what is included for that price.

Who is authorised to approve additional work?

Only send this request to the person named as the decision maker on the original contract. Sending requests to junior staff almost always results in delayed or missing approval.

Can I edit these sample letters for my own use?

Yes, all examples on this page are free to edit and reuse. You should adjust details, pricing and tone to match your industry and working relationship.

What happens if I complete work without this letter?

You have no legal right to payment for work that was not formally agreed. Most clients will refuse payment for unapproved work, even if they verbally requested it.

Every successful project relies on clear, respectful communication when scope changes. A properly written sample letter for additional work removes guesswork, prevents payment disputes, and preserves good working relationships with your clients. You do not need formal legal wording, just clear facts and a simple request for confirmation.

Bookmark this page to reference the templates next time scope shifts on your project. Take 5 minutes to send this formal request before starting extra work, and you will avoid hours of frustration, missed payments and conflict later.