Line Value Step by Step: 10-Selection Perms vs 12-Selection Perms

Perms are where most coupon budgets quietly get away from people. Add two extra selections to a permed entry and the stake does not creep up gently — it multiplies, sometimes dramatically. This walkthrough builds the maths from first principles, comparing 10-selection and 12-selection permutation blocks so the jump in cost is clear before you commit a stake rather than after.

Step 1: Understanding what a perm actually counts

A perm takes a block of selections larger than the minimum required for a single line, and generates every possible combination of the required size from within that block. If a coupon needs 10 matches per line and you perm across 11 selections, the system generates every possible way of choosing 10 from those 11 — mathematically, the combination formula C(n,k), read as “n choose k”. The number of lines this produces is the figure that gets multiplied by the line tariff to give the total stake.

Step 2: Calculating a 10-selection perm block

Using C(n,10) for a line requiring 10 matches, the line counts grow as follows as the block of selections expands beyond the minimum:

The pattern is unmistakable: going from 11 to 12 selections multiplies the line count six-fold, and from 13 to 14 it more than triples again. Each additional selection does not add a fixed number of lines — it adds a proportionally larger batch, because every new selection has to be combined with every existing one.

Step 3: Calculating a 12-selection perm block

The same logic applies to a line requiring 12 matches, using C(n,12):

Comparing the two tables side by side is the useful bit. A 12-selection perm block grows even faster than a 10-selection block for the same number of additional matches, because the baseline line requirement is bigger to begin with. Adding four matches beyond the minimum takes a 10-selection perm from £2.20 to £200.20, but takes a 12-selection perm from £2.60 to £364.00 — a noticeably steeper climb for the same four-match expansion.

Step 4: Why bankers change the equation

Bankers — selections fixed in every generated line rather than permed — are the standard way to keep a bigger perm affordable. A banker effectively removes a match from the “n” in the formula while leaving the minimum line requirement unchanged, which shrinks the combination size considerably. Using two bankers on a 10-match line with a 14-selection block, for example, reduces the working calculation to choosing 8 from the remaining 12 non-banker selections rather than 10 from 14 — a materially smaller number of generated lines for a similar overall spread of coverage.

Step 5: Choosing between the two block sizes

• A 10-selection perm block suits players who want broader coverage across more matches without an extreme jump in cost at moderate block sizes.
• A 12-selection perm block concentrates more matches into every single line, which can suit players confident about a slightly larger core group of results, but it punishes expansion beyond that core far more severely in cost terms.
• Bankers are worth considering on either block size once the selection count climbs past the low double figures, simply to keep the stake proportionate to what the entry is actually trying to achieve.
• Always calculate the total cost at the declared line tariff before submitting, rather than estimating — the tables above show how quickly a rough guess can be out by a wide margin.

Step 6: Mixing bankers with a part-permed block

A further refinement worth calculating is a block that mixes fixed bankers with a smaller permed group, rather than choosing between “all bankers” and “all permed” as if they were the only two options. Suppose a 10-match line uses three bankers plus a perm across nine further selections choosing the remaining seven spots: that reduces to C(9,7), which comes to 36 lines — a far more manageable figure than permiing all ten without any bankers at all, while still giving the perm genuine room to cover different combinations among the non-banker group. Working through a few of these mixed scenarios before settling on a final structure is usually time well spent, since the cost difference between a lightly-permed and heavily-permed block of the same nominal size can be substantial.

Step 7: A worked comparison to finish

Suppose a player is deciding between permiing 14 selections on a 10-match line or 14 selections on a 12-match line. The 10-match version generates 1,001 lines at £200.20; the 12-match version, using the same pool of 14 selections, generates only 91 lines at £18.20. The lower line requirement actually produces the larger, more expensive perm here, because there are simply more ways to choose 10 items from 14 than to choose 12 items from the same 14. This is the kind of detail that only becomes obvious once the maths is worked through properly, rather than assumed from the match count alone.

Keeping perms in proportion

None of this changes the fundamental uncertainty of football results — a bigger, more expensive perm buys broader coverage of combinations, not a higher chance of any individual outcome being correct. Treat perm maths as a budgeting discipline rather than a path to better odds, calculate the cost before you commit, and set a firm weekly limit that the excitement of a growing perm block cannot talk you past. This is a pastime for over-18s, and staking should always stay within what you can comfortably afford to lose, with winnings — illustrative or real — never relied upon as income. If working through combination formulas each week starts to feel less like a hobby and more like a chase for a bigger outlay, that is a clear signal to scale back rather than press on.