Email signatures after a merger or tenant migration
Two companies, two brands and often two Microsoft 365 tenants. How to handle email signatures after a merger, from day one to the tenant move.
How much does an annual renewal price increase cost on email signature software? Less than it feels in the first year and more than it looks by the third, because each rise is charged on top of the last. This post works through example rates in pounds, explains where the increase comes from, and sets out what to do before your next renewal quote arrives.
Most software subscriptions renew at the supplier's price on the renewal date, not the price you first signed at. Some contracts set the rise out as a fixed percentage, some tie it to an inflation index, and some simply say the renewal is at the supplier's then-current prices.
Exclaimer is a common example. Its renewal process article, read in October 2026, lists an annual price increase among the things that may affect a renewal quote, says reminders go out 90, 60 and 30 days before renewal, and asks for 30 days' notice to cancel. It does not give a figure, and an older article that did no longer does, so we do not quote one. If you want to know the figure for your own account, the renewal quote is the place to find it, and the time to ask is before the notice date.
The tables below take Exclaimer's Standard plan at its published UK price of £0.95 per user per month, billed annually, as shown to a UK visitor in October 2026. The 5 and 10 per cent rates are examples chosen to show the arithmetic, not figures any supplier has published.
| Rise at each renewal | Year 1 | Year 2 | Year 3 | Three years |
|---|---|---|---|---|
| None | £1,140.00 | £1,140.00 | £1,140.00 | £3,420.00 |
| 5 per cent (example) | £1,140.00 | £1,197.00 | £1,256.85 | £3,593.85 |
| 10 per cent (example) | £1,140.00 | £1,254.00 | £1,379.40 | £3,773.40 |
| Rise at each renewal | Year 1 | Year 2 | Year 3 | Three years |
|---|---|---|---|---|
| None | £2,850.00 | £2,850.00 | £2,850.00 | £8,550.00 |
| 5 per cent (example) | £2,850.00 | £2,992.50 | £3,142.13 | £8,984.63 |
| 10 per cent (example) | £2,850.00 | £3,135.00 | £3,448.50 | £9,433.50 |
Two things stand out. Over three years, a 10 per cent rise costs about 10 per cent more in total, not 20, because the first year is at the old price. But the rises compound: at 10 per cent a year, the fourth year costs £1,517.34 for 100 users, a third more than the first. The longer you stay, the more the starting price stops describing what you pay.
A small rise on its own is rarely a reason to move. Switching has its own cost in time: rebuilding or importing templates, checking rules and testing mail flow. Our post on the cost of switching email signature software puts numbers on each part.
It becomes worth it when the rise arrives alongside something else: features you pay for and do not use, support that takes days, or a plan that keeps the features you need on a dearer tier. Then the renewal is simply the natural moment to decide.
Footer365 publishes every price band in pounds on its pricing page, and a price never changes while a term runs: a new price can reach you only when the term renews. Sixty days before a 12, 24 or 36-month term ends, the account owner is emailed a renewal notice with the price of every option, so the renewal price is known two months ahead rather than discovered on the invoice. Our guide to renewing a committed term sets out exactly what happens. For a direct comparison with Exclaimer's plans, see the Exclaimer alternative page.
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Two companies, two brands and often two Microsoft 365 tenants. How to handle email signatures after a merger, from day one to the tenant move.
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