5% more for paying monthly: what changes on 1 October, and when not to switch

On 12 August Microsoft published a half-screen note in the Partner Center announcements: from 1 October 2026, CSP software subscriptions on annual commitments that are billed monthly carry a 5% uplift. It names Windows Server, SQL Server, client access licences and System Center as examples, with a "such as" that leaves the list open. Same product, same commitment, same term. What changes is when the money leaves the bank account, and from October that has a price.

Microsoft calls it a cost of capital uplift. The name is almost honest, because the reason the note actually gives is a different one: to "align pricing treatment across sales channels". And because the cost of capital implied by that 5%, as we will see below, looks nothing like that of a company borrowing at investment-grade rates. For whoever pays the invoice the useful question is a different one: what their own money costs them.

How these licences are actually bought

Before deciding anything it helps to know what you are looking at, because a CSP software subscription has two separate things you choose independently: the duration of the commitment and the frequency of the billing. The Partner Center documentation covers them in different paragraphs, and half the confusion at renewal time comes from mixing them up:

What is missing is the one most people assume: month to month with no commitment, with its 20% premium, belongs to per-seat subscriptions — Microsoft 365 and friends. For server licences, the Partner Center documentation describes only monthly, annual and triennial cycles on one- or three-year commitments, and when it details monthly billing the only product it names outright is the Windows Server 2022 Remote Desktop CAL. Anyone thinking "I will move to month-to-month so I can scale down" is thinking of a different catalogue.

Careful with the date: the first one published was wrong

The 12 August note opens with a correction from Microsoft itself: an earlier communication about this increase included an incorrect effective date, and it asks you to disregard it. It looks like a minor detail and it is not quite: if someone on your team, or the provider who handles your licensing, wrote the first date into the renewal calendar, they have the wrong one. The right one is 1 October 2026.

This already happened in 2025, and software was what was left out

This did not come out of nowhere. On 1 April 2025 Microsoft applied the same 5%, on an almost identical basis — monthly billing plans on annual and triennial commitments — to per-seat subscriptions: Microsoft 365, Office 365, Dynamics 365, Power Platform, Windows 365 and Enterprise Mobility + Security. Server software was left without an uplift back then. October is that same rule catching up with what was left out.

Read alongside everything else that has landed this summer, the pattern is clearer: the Microsoft 365 price rise of 1 July, the Windows 10 ESU toll that doubles every year and the end of the VMware licence bundled with the cloud on 31 October. Four money decisions in one quarter, none of them with a technical note to read.

The arithmetic: that 5% is not 5%

The 5% sounds small, and it is the wrong headline. That uplift buys less financing than it appears to: if you pay up front, the money leaves in full on day one; if you pay in twelve instalments, each euro leaves your account somewhere between zero and eleven months later, with an average delay of 5.5 months. You are paying 5% to defer five and a half months on average, not a year.

The calculation is ours, not Microsoft's, and it comes with the method attached so anyone can redo it or argue with it: equal monthly instalments, an average delay of 5.5 months, simple interest. With that figure on the table the conversation moves: it is no longer about a 5% increase, it is about whether you borrow for less than 11%. Plenty of companies with a credit line will say yes — and it is worth checking your actual rate before assuming it.

What you do not lose by switching

The objection that always comes up in the meeting is flexibility: "if I pay monthly, I can cut licences whenever I need to." It sounds reasonable and it is false. On an annual commitment the term is twelve months however it is billed: paying monthly spreads an invoice you already owe in full. The Partner Center documentation says so plainly in its cancellation section: after the first seven days of any term you are billed for the full term even if the customer stops using it, on any billing plan.

Anyone on an annual commitment with monthly invoicing is therefore paying for a freedom they do not have. From October they will pay 5% more for it.

When you should not switch

It would be easy to end here with "switch to annual and save", and as blanket advice it would be wrong. If your working capital costs or earns more than that 11% — credit line maxed out, heavy seasonality, every spare euro ploughed into growth — then 5% is cheap and the uplift works out in your favour. If the line is small, the maths fails from the other side too: 5% of €800 a year is €40, and coordinating the change with finance costs more than €40 in people's time.

Then there is the effect on that month's cash. Moving several lines to annual payment concentrates the outlay, VAT included; if they also land next to other large renewals, the saving does not make up for the spike. There the answer is usually yes, switch — but not all at once: stagger them by renewal date instead of piling them up.

One more warning about how it lands: the 5% is applied by Microsoft to the channel's cost, and what reaches your invoice depends on what you have signed with whoever sells you the licences. It might be exactly 5%, it might be less if they absorb part of it, and it might appear rounded up next to something else. What to ask is which line of your invoice, for how much, and from exactly which date. If the answer takes three weeks to arrive, that is information too.

The date that matters is not 1 October

There is a nuance here that saves pointless panic. For what you already have, the relevant date is each line's renewal: the uplift applies to the one falling on or after 1 October, and software subscriptions have auto-renewed by default since October 2021. The billing plan, moreover, is chosen at renewal, not whenever you fancy. Where there is a real window is in new purchases: a subscription bought from 1 October onwards is born with the 5% already on it. So what to do over the next few weeks fits on one sheet:

Why we are writing this if we do not live off selling licences

Worth saying plainly: we are not resellers of any particular platform and we take no commission on any of these licences. We advise on the merits, not on the commission, and here there is none to take. We write about it because we get the part that comes afterwards. On the customers we manage, the inventory is the source of truth — the same thing we do with networks in NetBox — and the dates come out of it: end of support, certificate expiry, renewals. It is not a special tool; it is having somebody watching it.

Because what stays with you from all this is not the 5%. It is that the decisions moving the most money in a mid-sized infrastructure are made with a calendar and a calculator, and that they are almost always set off by a notice published in August, when half the company is away. If 1 October finds you knowing which lines are going up and why you chose to leave them that way, the work is done. If it finds you in the November invoice, it is not.

Sources (verified on 17 August 2026): the 5% cost of capital uplift for CSP software subscriptions on annual commitments billed monthly, effective 1 October 2026, applied at renewal for existing subscriptions, with no change to annual billing or to month-to-month subscriptions, the stated reason ("align pricing treatment across sales channels") and the explicit correction of an incorrect effective date published in an earlier communication, from the notice "CSP software pricing update effective October 1, 2026" (12 August 2026) in Microsoft Learn's August 2026 Partner Center announcements. That notice lists Windows Server, SQL Server, client access licences and System Center preceded by "such as", so the list is open-ended; this post keeps it that way. Microsoft points to a FAQ (aka.ms/CostofCapital_FAQ) for the detail; on 17 August that link redirects to the announcements index and does not resolve, so what we say about how the uplift reaches the customer's invoice is our reading, not Microsoft's. Durations and billing frequencies (one- and three-year commitments; monthly, annual and triennial cycles; three-year SKUs with annual or triennial billing; Windows Remote Desktop Server CAL 2022 named as available with monthly billing), auto-renewal by default for subscriptions bought on or after 14 October 2021, and the seven-day cancellation window with full-term billing on any plan, from "Sell software subscriptions through CSP" (Microsoft Learn, updated 12 February 2026). The precedent of the same 5% applied on 1 April 2025 to per-seat subscriptions (Microsoft 365, Office 365, Dynamics 365, Power Platform, Windows 365 and Enterprise Mobility + Security), with the billing plan changeable at renewal, from channel coverage by CDW; the April 2025 Partner Center announcements are no longer published on Microsoft Learn. The 20% premium belongs to the New Commerce Experience monthly term on per-seat subscriptions, not to these server licences. The equivalent 11% annual figure (and 11.3% as an APR) is ours, not Microsoft's: equal monthly instalments, an average delay of 5.5 months against a single up-front payment, and simple interest. The VAT note, the cases where switching is not worth it and the checklist are also ours.