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How to Switch Factories Without Losing Your Tooling (or Your Stock)

Kristy Withers13 August 2026
Injection moulding machine on a factory floor with tooling being fitted to the press

Most founders do not leave a bad factory because leaving looks more expensive than staying. Here is what a switch actually costs, how long it takes, and why the tooling is the part that decides it.

Most founders do not leave a bad factory. They stay, because leaving looks more expensive than staying.

Sometimes it is. Usually it is not, and the reason founders get it wrong is that they price the switch as a single event instead of a sequence.

Here is the direct answer. You can move production to a new factory in eight to twelve weeks if you own your tooling, hold your own technical drawings, and run an overlap order instead of a hard cut. The cost is roughly one extra sampling round plus one month of stock cover you pay for twice. If your tooling sits at your current factory with nothing in writing that says it is yours, budget more and move slower.

This is not a first-order problem. This is the problem you get two or three years in, when the factory that was right for 500 units is not the factory that is right for 5,000.

When is it actually worth switching factories?

Four signals are worth acting on.

  • Your unit price has drifted up and the factory cannot point to an input cost that moved
  • Quality is slipping and you are paying for it in inspection failures, rework or returns
  • Lead times keep stretching and you only find out when you ask
  • You have outgrown their capability. A new material, a tighter tolerance or a volume they cannot hold

Three reasons are not worth acting on. One bad order. One rude email chain. A cheaper quote you have not verified.

A cheaper quote is not a saving. It is a claim, and it stays a claim until you have seen the sample and the full landed cost per unit. We have watched founders move for a 40 cent unit saving and lose it all back in freight, because the new factory sat four hours further from the port.

Who actually owns your tooling?

Tooling is the mould, jig or die built specifically to make your product. It is usually the single most expensive thing you own that you have never seen.

Paying for a mould is not the same as owning it. Ownership follows the paperwork, not the invoice. If your only evidence is a line item on a proforma that says "tooling fee", you are in a weak position the day you try to move it.

Three things establish ownership properly.

  • A tooling ownership clause in your manufacturing agreement that names you as owner regardless of who built or stores the mould
  • A separate paid invoice that describes the mould by its own number, not bundled into the unit price
  • Photographs of the mould with your company name physically engraved on it, plus its mould number and current location

That last one takes an afternoon and almost nobody does it. We cover the economics of this in more detail in who owns the mould.

One practical note on the bundled tooling fee. If your factory amortises the mould cost into your unit price, that cost is sitting inside your declared customs value on every shipment. You are paying duty on your mould, repeatedly. Separate it.

What can your current factory hold on to?

More than most founders expect. Work through this list before you say anything to them.

  • The mould or tooling itself
  • The golden sample, which is the approved physical reference every production run is measured against
  • The tech pack and technical drawings, if the factory engineered the product rather than you
  • Print plates, dielines and packaging artwork files held by their printer
  • Their component suppliers. Your zip, your magnet, your specific pigment
  • Test certificates and compliance reports issued in the factory's name

The certificates catch people out. An EN71 or AS/NZS test report issued to your factory covers that factory's production. It does not travel with you. Budget to re-test, and read what compliance testing actually involves before you assume the paperwork transfers.

How much does switching a factory really cost?

Say you make an injection moulded product. Runs of 3,000 units, quoted at $6 each. Illustrative numbers, but the shape is real.

  • Sampling at the new factory, two rounds including courier: $400 to $1,200
  • Tooling transfer, inspection and re-fitting into the new machine: $500 to $2,500 if the mould moves cleanly
  • A full retool, if it does not move or the new factory's machines cannot take it: $3,000 to $12,000
  • Re-testing and re-certification: $600 to $3,000 depending on your market
  • Duplicate stock cover, so you hold one month of sales twice
  • Six to ten weeks of your own management time

Now do the maths against the gain. A 50 cent unit saving on 3,000 units is $1,500 a run. If the switch costs $4,000, it pays back inside three runs. If the mould has to be recut and the switch costs $12,000, on that volume it does not pay back for two years.

Run that calculation before you take the meeting, not after. The decision about whether the business can carry the double stock month is a cash question rather than a sourcing one, and Kristy has written the founder side of it in how to manage cash flow in a product business.

How long does a factory switch take?

Twelve weeks is realistic for a product that already exists and already works. Here is where the time goes.

  • Weeks 1 to 2. Shortlist and vet candidates. Factory audit, not a video call
  • Weeks 2 to 3. Issue the brief, collect quotes, compare on landed cost
  • Weeks 3 to 6. Two sample rounds against your golden sample
  • Weeks 5 to 7. Move the tooling, or cut new tooling
  • Weeks 7 to 9. Pilot run. A small paid batch, inspected properly
  • Weeks 9 to 12. First full production and pre-shipment inspection

Two timing traps. Do not start a transfer in the eight weeks before Chinese New Year, because the new factory will be quoting capacity it is about to lose for a month. And do not expect focused attention from a Chinese factory during Canton Fair or Golden Week in October. Plan around both.

How do you switch without running out of stock?

Run an overlap, not a cut.

Place one more order with your current factory while the new one samples. Pay it, inspect it, ship it, land it. Only then do you have the cover to let the new factory take a pilot run without your store going empty.

A hard cut is not a faster switch. It is the same switch with your stock cover removed.

Two rules for the overlap period. Inspect that final order harder than usual, because a factory that suspects it is losing you has very little reason to fix a borderline batch. Use a third-party pre-shipment inspection and hold the balance payment until it passes. And keep briefing the new factory as though they are already your supplier, with a full factory-ready brief rather than a sample and a hope.

When do you tell your current factory?

After your final order has shipped, cleared inspection and landed. Not before. And not before your tooling is physically out of their building or formally documented as yours.

Then be straight about it. Give them a reason, pay everything you owe, and do not disappear. Sourcing is a small industry and factory managers move between factories. The supplier you exit badly today quotes you again in four years under a different company name.

The factory switch checklist

  • Written confirmation of who owns the tooling, with the mould number
  • Photographs of the mould, engraved with your name, with its current location
  • Your own tech pack, drawings and dieline files, held by you
  • The golden sample in your possession, not the factory's
  • A list of every component supplier and the exact specification of each part
  • Copies of all test reports, and a quote to re-test in the new factory's name
  • An NNN agreement signed with the new factory before you send anything
  • Two sample rounds quoted and paid for at the new factory
  • A pilot run booked and budgeted before full production
  • One overlap order placed with the current factory and landed
  • Landed cost compared, not unit price compared
  • A dated plan for moving or recutting the tooling

The takeaway

A factory switch is not one decision. It is a sequence, and the expensive part is almost always the tooling rather than the sampling.

Sort out ownership first. Run the overlap. Move the mould before you have the conversation. Do it in that order and a switch is a twelve week project with a known cost. Do it in the wrong order and it becomes a negotiation you cannot win, with your own mould as the hostage.

If you are weighing up whether to move production, or whether the answer is a different country entirely, our comparison of manufacturing in China versus India is the place to start. We are on the ground in India in September and at Canton Fair Phases Two and Three in October, and we vet factories for clients year round.

Book a sourcing call and we will tell you honestly whether the switch is worth making.

Kristy Withers

Kristy Withers

Founder of Source Haus. 20+ years in product sourcing and manufacturing across China, India and Southeast Asia.

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