Credit Score: How It Is Built and What Actually Moves It

A credit score is one number computed from a credit record. The score estimates how credit commitments have been handled, not how much money a household has. The number is built from the payment record, how much of an available limit is in use, how long the record runs, and what kinds of credit the record holds. A credit score is an opinion about a record, not a fact about a person.

The score is the most frightening number in household money, and it is the one number in household money that measures nothing about a household's position. The computation does not know what anybody earns, or why a single entry happened.

Because the computation cannot see a reason, a fallen score describes a record and is never a verdict on the people whose record it is. A number can fall by 48 points in a year when a household paid every single thing it had promised. A lane outside a tailoring counter was dug up for five months and the groceries moved onto a card. The computation saw the card, never the lane.

What is a credit score actually a score of?

Start somewhere ordinary. A shopkeeper who has known a customer for six years extends credit on a memory: that person comes back on Saturday and settles. Make the shopkeeper hand it to a stranger, in one number, and what fits is the ledger.

A credit scoreA single number computed from a credit record. The number is produced by a company that collects the record, not by a bank and not by the person the record is about. is that ledger squeezed into one figure. A credit information company computes it from a credit recordThe file a credit information company keeps on one borrower, holding each credit line, its limit, its balance and whether each payment arrived when it was due., the file holding every credit line in a borrower's name, its limit and balance, and whether each payment arrived on time. The score summarises that record and nothing else, so anything the record does not hold cannot reach the number.

How Credit Scores Work: which inputs move the number, and in what order?

There is no mystery about what goes in. Five things go in, read in a rough order of importance each credit information company sets for itself. No weights appear in the order that follows. Each credit information company keeps its own weighting to itself.

First and largest is the payment recordThe month by month record of whether each credit commitment was paid when it was due, and how late it was if it was not.: whether each commitment was paid when it fell due. Second is utilisationThe share of an available credit limit that is being used, measured at a moment rather than across a period., the share of a limit in use. Third is the length of the recordHow long the oldest credit line on the file has been open. The length grows only with time and shortens when an old line is closed.. Fourth is the mix of creditThe different kinds of credit a record holds, for example an instalment loan against a revolving card.. Fifth is the record of enquiriesA recorded instance of somebody checking a credit file. An enquiry made because a borrower applied for credit is recorded differently from a borrower looking at their own file..

The first two inputs do most of the moving and the last two do very little. Knowing that order is most of what is useful. A household worrying about the mix of credit while carrying a large balance against a small limit has left the second item alone. Aiming at the smallest input is a failure of information, not of effort.

Why does the payment record weigh more than everything else?

The payment record weighs most because it holds events rather than proportions, so a single missed date is recorded as a fact and is not diluted by the dates that were kept. If it held a percentage, seventeen payments on time and one late would arrive a shade under 95 per cent and almost nothing would move. The payment record holds a row per credit line per month instead, and one row says a payment sat undone for 40 days.

For the Bhosale household that means this. In year two it paid the last ten of the two-wheeler loan's thirty instalments, Rs 3,150/- each, on the day each fell due, and the thirtieth closed the loan on schedule in January. The household paid the card minimum in full and on the due date in all seven months the card carried a balance. Seventeen payments arrived on time. And one instalment of Rs 4,000/- went 40 days past its date.

Why is utilisation the one input a household can move inside a month?

Utilisation is the odd one out. Every other input is a history. Utilisation is a photograph taken on one day, of one thing: the balance sitting on a credit line against the limit on that line.

Here is the everyday version. A wedding hall holds four hundred people. Walk in on a Tuesday afternoon and count nine; walk in on Saturday evening and it is full. The count depends entirely on when somebody looked.

Work the figures. The card's limit is Rs 60,000/-, invented, and from April to August the household cleared it in full, so the balance reported was nil. By 31 March it stood at Rs 48,594/-, being Rs 54,400/- spent and Rs 6,447/- of interest less Rs 12,253/- paid in minimums. The balance of Rs 48,594/- is 81.0 per cent of the line.

Households get caught at exactly this point. Not one rupee of that Rs 48,594/- is overdue. Utilisation does not measure whether a borrower is behind. Utilisation measures how much of a line is occupied, and a serviced balance occupies as much as a neglected one.

Why can the length of the record never be sped up?

The third input has no lever on it. The length of the record is how long the oldest credit line has been open, and it grows at one month per month for everybody.

Closing an old line shortens the record immediately. Opening a new one does not lengthen it at all. The length of the record is the only input that can be lost but never gained faster. Close a card taken eight years ago and the only way back is to wait another eight years.

For the Bhosale household this input barely moved, and that is the point. The card has been open two years, and the loan ran its full thirty months and closed in January.

What do the mix of credit and the enquiries actually add?

The mix of credit and the enquiries are the two smallest inputs, worth understanding mostly so that they can then be set aside. An instalment loan has a fixed number of payments and an end date; a card has a limit that refills as it is paid. The Bhosale household's record shows both.

Enquiries record who has looked at the file. A household looking at its own credit record is not an application, and the two are recorded differently, so a household reading its own file does not move the number. Whether an application leaves an entry, and for how long, is set by the credit information companies.

What does not move a credit score at all?

The list of things that do not move a score is short, and holding on to it saves a household a great deal of worry. Income does not move it: the score never receives a salary figure. Savings do not move it either. Rs 30,180/- in a buffer account and Rs 84,000/- in a provident fund are, to the computation, the same as nothing.

Nor does the reason, and that is where the gap is widest. The record showed one instalment 40 days late. The record did not show that a drainage trench closed a market lane for five months, or that the counter took Rs 52,800/- against Rs 96,000/- the year before. Not one figure in that sentence is an input to a credit score. A score can fall in a year where a household made no decision at all.

Why did the score fall in a year when everything was paid on time?

The score stood at 712 on 1 April of year two and 664 on 31 March, a fall of 48. Exactly two things on the record changed.

The first was utilisation. Until September the card carried nil against its Rs 60,000/- limit. The household cleared it in full every month. By 31 March the card carried Rs 48,594/-, or 81.0 per cent of the line. The second was one instalment paid 40 days after its date.

Now set beside that what did not change. The household paid the last ten of the loan's thirty instalments on the day each was due, closing it on schedule, and across the loan's life it paid thirty of thirty on time. The household paid the card minimum in full all seven months. A household closed a loan on schedule, paid seventeen commitments on time in twelve months, changed nothing about how it spends, and the number still fell by 48 points.

The Moved column carries the whole of it: the two rows that say yes are the two inputs at the top of the order.

How fast does each input come back?

The inputs recover at completely different speeds, so there is no single waiting time.

Utilisation is a photograph rather than a history, and a photograph can be retaken. Utilisation is the only input that recovers at the same speed it fell.

An entry in the payment record is the slow one. An entry does not disappear when the money is paid. The entry records what happened rather than what is outstanding. The entry ages instead, over a period set by the credit information companies and their supervisor.

The length of the record cannot be sped up by anybody, and it is the only input on which patience is the entire strategy. The one way to affect it is downwards.

What is the score used for, and what does it not decide?

A score is a sorting device, letting somebody deciding about a stranger put many files into a rough order before spending time on any one. The score is one input into somebody else's decision and it is not the decision. A household can never read an outcome off the number.

Each lender's own policy decides what that lender does with the number. Approving credit and setting a price are both acts by a lender. A score can do neither.

What should a household hold on to from all of this?

Three things, and none is a target. The number summarises five recorded facts and not a household. The two inputs at the top do almost all of the moving. And a fall is a signal to read the record. A wrong entry can only be raised with the company holding it.

The Bhosale household's 48-point fall is a completely accurate description of two rows on a record and a completely useless description of the household that produced them. The record is not lying. The record simply has no column for a lane that was dug up for five months.

The Bhosale household, Meghna Bhosale, Ashok Bhosale, Ira Bhosale, Sahyadri Freight Services Private Limited and the second household in the figure about closing a card are invented.
Educational material. Not advice on any investment, tax, budget or market position.