Six semiconductor price increases
in five months of 2026.

Six semiconductor price increases have taken effect since the end of April 2026, and not one of them arrived with an allocation letter attached. STMicroelectronics moved three times: 26 April, 28 June, 23 August. Infineon and Texas Instruments both went on 1 July, Microchip on 14 August. Count back to ST's first customer notice on 24 March and that is five months of repricing on parts you can still order and still receive on schedule. The shelf is full. The number on the shelf edge is what moved, and buffer stock does nothing about that.

Announcement dates are as reported by the trade press and the distribution channel; sources 1 to 10 below. Where a vendor published no percentage, the cell says so. Treat the 15-85% range on TI as distributor commentary, not a TI figure.

Why are six vendors repricing at once?

Their own input costs moved first, and the numbers upstream are larger and better documented than anything the vendors have disclosed downstream.

Start with foundry. Samsung raised wafer prices by up to 15% from July 2026, split by node and by region: SF4 up 10 to 15% for customers in China and the United States, 5 to 10% for customers in Taiwan, and the 5nm SF5 line up 10 to 15%. Even 8nm, old enough that it normally competes on price alone, went up close to 10%. That is Reuters reporting, summarised by HWBusters in July 2026.

TSMC started earlier and is running a longer programme. TrendForce reported on 3 November 2025 that TSMC had been telling clients since September to expect average increases of around 3 to 5% on sub-5nm from January 2026, covering 2nm, 3nm, 4nm and 5nm, as the first step of a multi-year plan. Silicon Analysts puts the advanced-node range wider at 3 to 10%. The exact figure matters less than who is setting it: TSMC took 72.3% of global foundry revenue in the first quarter of 2026, up from 70.4% the quarter before, per TrendForce data published 12 June 2026, and its sub-5nm capacity is booked out on AI.

Then the substrate underneath all of it. Shin-Etsu, SUMCO and GlobalWafers ended roughly three flat years and went into a second round of increases from May 2026. High-end wafers for AI compute rose 18 to 22%, standard 12-inch rose 3 to 8%, and the cumulative annual increase is above 15%. Sunsirs has order books full through the third quarter and 300mm epitaxial utilisation running above 90%.

A device vendor buying at those numbers has three moves available: absorb the cost, shift the product mix, or pass it through. Table 1 is what passing it through looks like on your desk.

Is the part short, or only expensive?

A part is short when you cannot get it on your schedule at any price, and only expensive when it ships on time and costs more than your last purchase order. Those are two different problems with two different fixes, and most risk registers still carry one column for both.

The trap is in the backlog rule, and it is the reason stock built in June does not save you in September. Microchip's 29 June notice says the 14 August adjustment applies to all orders and shipments from the effective date. Read that literally: an order you placed in May, shipping on 20 August, can be invoiced at the new price. ST's 23 July notice confirms the increase from 23 August and says nothing at all about how existing backlog will be treated, which is worse, because silence is not protection. If your LTA does not spell out backlog treatment in writing, you do not have a price, you have an expectation.

How tight has the cadence become?

One price adjustment took effect in the first quarter of 2026, and eight took effect in the five months after it. Plotted by effective date, the clustering is the story: April, late June into early July, then two more inside ten days of August.

Text equivalent: 1 Feb Analog Devices; 1 Apr NXP and Texas Instruments; 26 Apr STMicroelectronics; 28 Jun STMicroelectronics; 1 Jul Infineon and Texas Instruments; 14 Aug Microchip; 23 Aug STMicroelectronics. Sources 1 to 10 below.

Two things follow from that shape. A vendor review run once a year will miss most of it, because the gap between adjustments is now measured in weeks. And the increases are segmented rather than portfolio-wide: ST's June round deliberately targeted families the April round had left alone, so a buyer who checked in May and found their parts untouched was wrong by the end of June. Per part number, per notice, per date. There is no shortcut.

What actually defends the price?

Three things, none of them inventory: an indexed contract, an LTA renewal timed ahead of a known effective date, and a backlog rule written into the agreement rather than assumed.

An indexed contract ties the device price to something you can both see, a 300mm wafer index or a published foundry rate card, with a cap and a floor on the annual move. It will not stop prices rising when Shin-Etsu raises wafers 18%. It does stop the unbounded, unexplained, three-times-a-year adjustment, and it moves the argument from "the market" to a number you can both check.

Renewal timing is the cheaper lever and the one most teams get backwards. Deferring a renewal in the hope the wave passes just hands the vendor a stronger position, because the next notice lands and your leverage goes with it. If you knew on 23 July that ST's third increase would take effect on 23 August, the window to renegotiate closed in early August. Look at Table 1, mark the vendors whose notices have run twice already, and open those conversations before the third one arrives.

Everything else is housekeeping that pays for itself. Record quote validity as a field, not a footnote. Re-cost the BOM against effective dates instead of on the quarter boundary. Keep lifecycle status under review on parts that are merely expensive today, because a device carrying a thin margin under a repricing wave is a device the vendor is thinking about discontinuing. And on the parts that really are short, the old rules stand: dual source early, and remember that on AEC-Q qualified automotive lines approving that second source takes months you have to start now. Where the franchise pipe quotes past your build date, 150,000 lines of independent stock and a Malmö lab behind it close the gap.

How long is a quote good for now?

Shorter than your approval cycle, which is the whole problem. Franchise quotes that carried 30 to 90 days in a stable market are being written far tighter on volatile analog, power and microcontroller lines, and 72 hours is what European buyers report on the worst of them. That number is channel practice rather than a published policy, so take it as directional and confirm the validity date in writing on anything material.

The practical consequence is a process change, not a mindset. Stop pulling quotes speculatively and sitting on them. Pull the quote when the decision is ready to be made, and if internal approval takes longer than the validity window, either compress the approval or negotiate the window explicitly before you ask for the price. Any quote issued before a vendor effective date is stale on the day after it, whether or not the printed expiry has passed. Treat a quote as perishable. It has a date on it for a reason, and in 2026 the date is doing real work.

Frequently asked questions

How many semiconductor price increases have there been in 2026?

Six took effect between 26 April and 23 August: ST on 26 April, 28 June and 23 August, Infineon and TI on 1 July, Microchip on 14 August. Add NXP on 1 April and Analog Devices on 1 February and there are nine dated adjustments across the first eight months.

Why does buffer stock not protect against a price increase?

It defends lead time, which is a different risk. Replenishment books at whatever the price file says on the day, and several 2026 notices apply to all orders and shipments from the effective date, so backlog you placed months ago can be repriced before it ships.

What is driving the 2026 semiconductor price increases?

Foundry and wafer costs. Samsung went up to 15% from July, TSMC began 3 to 5% annual rises on sub-5nm in January, and Shin-Etsu, SUMCO and GlobalWafers put high-end AI wafers up 18 to 22% after roughly three flat years.

How long is a component quote valid in 2026?

Days rather than months on the volatile lines, with 72 hours reported at the sharp end. That is channel practice, not published policy, so get the validity date in writing and re-quote before you release the order.