Outsourcing CAD Drafting to India: A Practical Guide for Overseas Engineering Teams

Outsourcing3 October 2026·By The Sarjan Solution Team

Outsourcing CAD work offshore is no longer an experiment. Engineering firms in the UK, the USA, Canada, Australia, Germany, the Netherlands, the Nordics and beyond routinely send drafting, 3D modelling and simulation to India. The engineering skills are there, the CAD platforms are the same, and the time difference turns an overnight gap into extra working hours. Done well, it gives a design office capacity it could not otherwise hire. Done badly, it produces drawings that have to be redrawn at home.

This guide is written from the supplier side of that relationship. It covers what works, what does not, and how to set a project up so the first delivery is usable.

What is worth outsourcing — and what is not

The best candidates are well-defined tasks where the design intent already exists:

• Detail drawings from existing 3D models — the most common job, and the most time-consuming for in-house engineers.
• 2D to 3D conversion of legacy paper, PDF or AutoCAD drawings into parametric models.
• Sheet metal and weldment modelling, flat patterns and cut lists.
• Reverse engineering of spare parts and undocumented machines.
• FEA and CFD checks on a defined geometry with known loads.
• CAD migration when you change platforms or suppliers.

Open-ended concept work, where the requirements live in someone's head, is harder to outsource, and so are tasks that need daily access to the physical product. Both can still be outsourced, but they need a longer relationship and more structured communication, so start with smaller, well-defined jobs.

The input package: what to send

Most outsourcing problems trace back to the brief. A good input package answers, in writing, the questions a drafter would otherwise have to guess:

• Source data: native CAD files, STEP, PDFs, sketches or measured photos. If a drawing and a model disagree, say which one wins.
• Drawing standard: ASME Y14.5 (common in North America) or ISO GPS, BS 8888 and AS 1100 (UK, Europe, Australia). They differ in more than symbols — see our ASME vs ISO comparison.
• Units and projection: inch or metric; first-angle or third-angle.
• Software and version: a SolidWorks 2025 file will not open in SolidWorks 2023. State the version you need.
• Templates: title block, drawing template, layer standard, BOM format and part-numbering scheme.
• Materials, finishes and tolerances where known, and your general tolerance standard where not.
• Language of drawing notes if not English — supply the approved wording.
• A finished example: one drawing your team considers "right" is worth pages of instructions.

A competent supplier will come back with questions before starting. That is a good sign. A quote that arrives with no questions usually means the gaps will be filled with guesses.

Time zones: how the overnight model actually works

India Standard Time is UTC+5:30 and does not change for daylight saving. The working pattern depends on where you are:

• UK, Ireland and continental Europe (India 3.5–5.5 hours ahead): a shared window covering your morning. Calls and mark-ups happen live, and most of the work is done before you start.
• USA and Canada (India 9.5–13.5 hours ahead): little overlap, so you send work at the end of your day and it is in your inbox the next morning. Questions are batched for a short call at the start of your day.
• Australia and New Zealand (India 2.5–7.5 hours behind): our day overlaps your afternoon. Brief after lunch, and results usually arrive by the next morning.
• UAE and the Gulf (India 1.5–2.5 hours ahead): almost the same working day.

Every one of these patterns works, as long as both sides agree it at the start. Our worldwide page has the details for each market.

Protecting your IP

Confidentiality should be the default, not a negotiation:

• Sign an NDA before any files are exchanged. A reputable supplier will sign yours or offer theirs without being asked.
• Put ownership of the deliverables in writing in the engagement terms.
• Share only what the job needs. A drafter detailing a bracket does not need the whole machine.
• Use a file-sharing method you control, and remove access when the project ends.
• Export control: technical data controlled under ITAR, the EAR, Canada's Controlled Goods Program or similar regimes must not be sent to a foreign company without authorisation. Confirm your data is unrestricted before sending it offshore.
• Personal data: engineering drawings rarely contain personal data, but if they do, GDPR, UK GDPR or your local privacy law applies to the transfer.

Pricing models

• Fixed price per job — best for defined tasks. You know the cost up front. Insist that the quote states scope, deliverables, standard, file formats, revision rounds and delivery date.
• Hourly rate — flexible for open-ended work, but only sensible with clear reporting and an agreed cap.
• Dedicated engineer — a named engineer working for you each month. Efficient once a supplier knows your products and standards.

Most clients start with fixed-price small jobs and move to a dedicated model once trust is built. Do not compare suppliers on headline rate alone: a drawing that needs two rounds of correction costs more than one that is right first time.

Quality control: how to know it is right

Ask how work is checked before delivery. A supplier should describe a check for standards compliance (projection, tolerancing, title block), model integrity (fully constrained, no broken references) and manufacturability (can it actually be made, bent, welded and inspected?). On your side, review the first few deliveries closely and turn your corrections into written rules. After two or three jobs, most of them stop recurring.

Common mistakes

• Starting with your biggest, most urgent project. Start with one part or one drawing on a reasonable deadline.
• Leaving the standard unstated. ASME and ISO drawings look similar and mean different things.
• Sending marked-up PDFs with no explanation. A one-line note per change saves a round of questions.
• Changing the engineer every job. Continuity is where most of the efficiency comes from.
• No agreed file version. Discovering that files will not open in your CAD version is a common and avoidable delay.

A sensible way to start

Pick one representative job, send the input package described above, and judge the supplier on the questions they ask, the accuracy of the quote and the quality of the first delivery. If those are right, scale up. If not, you have lost very little.

Sarjan Solution was founded in Ahmedabad in 2018 and has a second office in Gandhinagar. We work with clients in the UK, USA, Canada, Australia, Germany, the Netherlands and many more countries. See also 2D drafting and 3D modelling and how to choose a CAD outsourcing partner.

Frequently asked questions

Is it cheaper to outsource CAD drafting to India?

Usually, yes — but the saving only holds if the drawings are right first time. Compare suppliers on the total cost of usable drawings, including corrections, not on hourly rate.

How long does outsourced CAD drafting take?

Simple detail drawings are often turned around in two to three working days, and the time difference means smaller jobs can be finished overnight. Larger packages run on an agreed delivery schedule.

Which CAD software do Indian outsourcing firms use?

The same platforms as Western firms: SolidWorks, Autodesk Inventor, AutoCAD, Creo, Solid Edge and CATIA. Agree the software version up front so files open without conversion.

How do I protect my designs when outsourcing CAD work?

Sign an NDA before sharing files, put ownership of deliverables in writing, share only what each job needs, and confirm that no export-controlled data is involved.