Winning good suppliers or contractors often starts with a well-written invitation. Before prices are compared or contracts are signed, someone has to send the first letter that clearly explains the opportunity and encourages qualified companies to participate. A rushed invitation can create confusion, attract the wrong bidders, or leave out details that lead to endless questions later.
A solid invitation to tender letter does a simple job. It tells potential bidders what the project involves, how to obtain the tender documents, when submissions are due, and any basic conditions they should know before deciding whether to bid. The wording does not have to sound overly formal. It simply needs to be complete, clear, and professional.
The samples below cover different situations that businesses, government agencies, schools, charities, and private organizations commonly face. Each one can be used as it is or adjusted to suit the project at hand.
Sample Letters of Invitation to Tender
The samples below use different tones and situations so you can pick one that best matches your organization and project.
1. General Invitation to Tender Letter
Subject: Invitation to Tender for Office Building Renovation
Dear Sir or Madam,
ABC Holdings Limited invites your company to submit a tender for the renovation of our five-storey office building located at 18 Marina Road, Lagos.
The project includes interior remodeling, electrical upgrades, plumbing improvements, painting, flooring replacement, and external finishing works. Tender documents containing the complete specifications, drawings, eligibility requirements, and evaluation criteria are available from our Procurement Department beginning July 22, 2026.
Completed tender submissions must reach our office no later than 4:00 p.m. on August 18, 2026. Bids received after this deadline will not be considered.
Interested bidders are encouraged to attend a mandatory site inspection scheduled for July 29, 2026, at 10:00 a.m. Attendance will allow contractors to better understand the project requirements before preparing their quotations.
Please submit all tender documents in a sealed envelope clearly marked “Tender for Office Building Renovation.”
Should you require clarification before the submission deadline, kindly contact the Procurement Office at procurement@abcholdings.com or call +234 800 555 1234 during business hours.
We appreciate your interest and look forward to receiving your proposal.
Yours faithfully,
David Johnson
Procurement Manager
ABC Holdings Limited
2. Invitation to Tender for Supply of Goods
Subject: Invitation to Tender for Supply of Medical Laboratory Equipment
Dear Supplier,
Sunrise Medical Centre hereby invites qualified suppliers to submit tenders for the supply and delivery of medical laboratory equipment for our newly completed diagnostic facility.
The required items include automated hematology analyzers, clinical chemistry analyzers, laboratory centrifuges, microscopes, refrigerators, and related accessories. Full technical specifications are contained in the tender documents available upon request from our Purchasing Department.
Tender submissions should include product specifications, warranty details, delivery timelines, company profile, previous supply experience, and a detailed price quotation.
All bids must be submitted on or before August 12, 2026, by 2:00 p.m. Late submissions will not be accepted.
Successful bidders may be invited to demonstrate selected equipment before the final award decision is made.
If you have any questions regarding this tender, kindly send your inquiries by email before August 5, 2026.
Thank you for your interest in partnering with Sunrise Medical Centre.
Yours sincerely,
Grace Williams
Head of Procurement
Sunrise Medical Centre
3. Invitation to Tender for Road Construction Project
Subject: Invitation to Tender for Community Road Construction Project
Dear Sir or Madam,
Green Valley Development Authority invites experienced civil engineering contractors to submit tenders for the construction of approximately 8.5 kilometers of asphalt road connecting Green Valley Estate to the Eastern Bypass.
The scope of work includes site clearance, earthworks, drainage systems, culvert installation, asphalt paving, road markings, traffic signs, and all associated civil works as detailed in the tender documents.
Tender documents may be collected from the Procurement Office between July 22, 2026, and August 6, 2026, during normal working hours upon presentation of a formal request letter.
A compulsory pre-bid meeting and site visit will be held on August 1, 2026, at 9:30 a.m. Contractors should send no more than two representatives.
Completed tenders must be sealed, clearly labeled “Tender for Green Valley Road Construction Project,” and delivered to the address below no later than 3:00 p.m. on August 20, 2026.
The Authority reserves the right to accept or reject any tender without incurring any obligation to any bidder.
Thank you for your interest. We look forward to receiving your proposal.
Yours faithfully,
Samuel Roberts
Director of Procurement
Green Valley Development Authority
4. Invitation to Tender for School Construction
Subject: Invitation to Tender for Construction of New Classroom Block
Dear Contractor,
Bright Future Academy is pleased to invite qualified building contractors to submit tenders for the construction of a two-storey classroom block at our main campus.
The proposed building will consist of twelve classrooms, staff offices, restrooms, a science laboratory, and supporting external works including walkways and drainage.
Tender documents containing architectural drawings, structural designs, bills of quantities, technical specifications, and submission instructions are available from the School Administration Office beginning July 25, 2026.
Interested firms should submit the following documents together with their bids:
- Company registration certificate
- Tax clearance certificate
- Evidence of similar completed projects
- List of key technical personnel
- Proposed work schedule
- Financial quotation
Sealed tenders must be received no later than August 22, 2026.
Any requests for clarification should be submitted in writing before August 12, 2026.
We appreciate your participation and wish every bidder success during the tender process.
Yours sincerely,
Rebecca Thomas
School Administrator
Bright Future Academy
5. Invitation to Tender for Information Technology Services
Subject: Invitation to Tender for Network Infrastructure Upgrade
Dear Prospective Bidder,
TechWorks Manufacturing Limited invites suitably qualified information technology companies to submit tenders for the upgrade of our corporate network infrastructure across three office locations.
The project includes the supply, installation, configuration, testing, and commissioning of enterprise networking equipment, structured cabling, wireless access points, firewalls, backup systems, and network monitoring software.
Tender documents may be requested electronically by emailing the Procurement Department. All interested companies should review the technical requirements carefully before preparing their submissions.
Tender proposals should include a detailed implementation plan, equipment specifications, project timeline, maintenance support arrangements, training plan for staff, and a comprehensive financial proposal.
Completed bids must be submitted electronically and in hard copy no later than August 15, 2026.
Shortlisted bidders may be invited to make a technical presentation before the evaluation committee as part of the assessment process.
We appreciate your interest in working with TechWorks Manufacturing Limited and look forward to reviewing your proposal.
Yours faithfully,
Michael Evans
Procurement Manager
TechWorks Manufacturing Limited
6. Invitation to Tender for Cleaning Services
Subject: Invitation to Tender for Annual Cleaning Services Contract
Dear Service Provider,
Silver Heights Commercial Complex invites qualified cleaning companies to submit tenders for the provision of professional cleaning services for our office complex.
The successful contractor will be responsible for daily office cleaning, restroom sanitation, window cleaning, waste collection, floor maintenance, and periodic deep cleaning of common areas.
The contract will run for an initial period of one year, with the possibility of renewal based on satisfactory performance.
Tender submissions should include your company profile, evidence of similar contracts completed within the past five years, staffing plan, equipment list, health and safety procedures, insurance details, and your proposed pricing.
Interested companies may inspect the premises on August 4, 2026, between 10:00 a.m. and 12:00 noon by prior appointment.
All tender documents must be submitted in sealed envelopes no later than August 18, 2026.
Thank you for considering this opportunity. We look forward to reviewing your submission.
Yours sincerely,
Laura Bennett
Facilities Manager
Silver Heights Commercial Complex
7. Invitation to Tender for Catering Services
Subject: Invitation to Tender for Corporate Catering Services
Dear Sir or Madam,
Westbridge Consulting Limited invites qualified catering companies to submit tenders for the provision of daily staff meals and refreshments during corporate meetings and special events.
The selected caterer will be expected to provide breakfast options, lunch services, tea breaks, bottled water, and refreshments for company functions held throughout the year.
Tender submissions should include sample menus, pricing schedules, food safety certifications, references from previous clients, staffing details, and information about your production facilities.
Preference will be given to companies with proven experience serving organizations of similar size and those that can accommodate vegetarian, vegan, halal, and allergy-sensitive meal requests.
Completed tenders must be submitted before 5:00 p.m. on August 14, 2026.
Only shortlisted companies will be invited for food tasting sessions before the final selection.
Thank you for your interest in partnering with Westbridge Consulting Limited.
Yours faithfully,
Emily Carter
Administration Manager
Westbridge Consulting Limited
8. Invitation to Tender for Security Services
Subject: Invitation to Tender for Security Guard Services
Dear Prospective Contractor,
Metro Business Park hereby invites licensed security service providers to submit tenders for the provision of security services across our commercial premises.
The successful contractor will provide trained security personnel for access control, visitor management, patrol duties, incident reporting, emergency response, and night surveillance.
Tender documents should include company registration details, operating license, evidence of insurance coverage, staff training records, client references, proposed deployment schedule, and a detailed financial quotation.
Interested firms may visit the premises by appointment before submitting their bids to gain a better understanding of the security requirements.
Tender submissions must reach our Procurement Office no later than August 21, 2026.
The evaluation committee will consider experience, technical capability, service quality, pricing, and overall value before making its final decision.
We appreciate your participation and look forward to receiving your proposal.
Yours sincerely,
Richard Coleman
Head of Administration
Metro Business Park
Wrapping Up
A strong invitation to tender letter sets the tone for the entire procurement process. Clear instructions, realistic deadlines, and enough project details help qualified bidders prepare accurate proposals while reducing unnecessary questions and misunderstandings. Whether the project involves construction, supplies, technology, security, or professional services, a well-structured invitation gives every bidder the same information from the very beginning.
Pick the sample that best fits your situation, adjust the names, dates, and project details, then review it carefully before sending it out. A few extra minutes spent polishing the invitation today can make the tender process much smoother for everyone involved.