At its longest window the coupon calendar lists every coupon and redemption falling due in the next twelve months, so a reader can map a whole year of gilt income dates rather than a season.
The longest window
The coupon calendar offers four windows — 30, 90, 180 days and 12 months — and the twelve-month window is the longest. It lists every coupon and every redemption falling due in the coming year, counted forward from the report date the page is built from. A year is the natural horizon for the calendar, because a conventional gilt pays twice a year, so a full twelve months catches both of its coupons for every gilt that runs through the year.
What a full year shows that a short window cannot
Gilt coupons cluster on a handful of months, because most gilts pay in March and September or in June and December, or on the anniversary months of their own issue. A short window catches whichever cluster happens to fall in it; a full year shows where the clusters are and where the quiet months lie. It also catches the maturities that fall later in the year, which a 90-day window would miss entirely, so the twelve-month view is the one that shows both the income a year pays and the capital a year returns. For a reader planning income, the quiet months matter as much as the busy ones: a month with no payment is a month a holding produces nothing, which a run of date rows makes hard to see and a whole year makes plain.
- Coupons cluster on a few payment months; a year shows the pattern, not one season of it.
- Redemptions later in the year appear only in the longer window.
- Quiet months are as useful to see as busy ones when planning around income.
- The window is carried in the address, so a year view can be returned to or shared.
Mapping a year month by month
The calendar groups its rows by month and then by payment date, and a strip above the table links each month to its anchor, so a reader can walk a year a month at a time rather than scroll twelve months of rows. The same view can be downloaded as a CSV that captures exactly the year, filters and holding on screen. The table below is an illustration of a partial year for a £2,000 nominal holding — five representative months, not a full twelve — to show how a year reads when the months are laid out. The gilts and amounts are illustrative and not quotes from any gilt in issue.
| Month | Coupons due | Redemptions due | Events |
| January | £30.00 | £0.00 | One coupon |
| February | £5.00 | £2,000.00 | One coupon, one redemption |
| March | £40.00 | £0.00 | One coupon |
| September | £30.00 | £0.00 | One coupon |
| December | £5.00 | £0.00 | One coupon |
Read as a year, the illustration shows a holder who receives coupons in five months, returns a gilt's principal in February, and has several months with no payment at all. That is the useful thing the twelve-month view makes visible: not a single next date, but the shape of the year — where the income concentrates and where the capital comes back. Scaling the nominal changes every amount but not the shape.
Sizing the year to a holding
The amount column is sized for a nominal holding, defaulting to £100. Set it to a holding and every month scales to that nominal, so the year's coupons become the cash the holding actually pays across the twelve months. For a conventional gilt the figure is the coupon on that nominal; for an index-linked gilt it is an income estimate, taking the real coupon, applying the published index ratio and assuming no further inflation before the payment, marked as an estimate rather than a contractual amount. A reader whose holding is spread across several gilts sees the total in the month rows and the detail in the date rows beneath. A reader who sets the nominal to a holding they actually own, booked in a portfolio, sees the year's coupons and redemptions for that holding rather than a per-£100 rate — the figure that answers the planning question of how much cash comes in, and in which months, across a year.
From a year to a single gilt
The twelve-month calendar reuses the same per-gilt schedule rendered on a gilt's own page, opened from the conventional gilts list, so a year seen across the market can be opened up gilt by gilt. The calendar shows a year of dates across every gilt at once; the flows page shows a single gilt's every future coupon and its final repayment for £100 nominal, which is the detail behind any one row. A reader mapping a year on the calendar can follow a month of interest into the gilt whose schedule produces it, and the two agree by construction, so a month of coupons on the calendar is exactly those months taken from the schedules behind it.
Background, not advice
This guide explains how the twelve-month window of the coupon calendar shows a year of coupon and redemption dates, and how to read that year month by month. It is general background on how the site presents a schedule, not investment, tax or legal advice for any reader's circumstances, and it is not a substitute for professional advice. The figures above are illustrative and state their inputs; the primary source for a real gilt's payment dates and cash flows is the gilt's own record and the Debt Management Office.