Finance and Data Clarity 13 September 2026 5 min read

Capture Clean Data at the Source, First Time

Bad data is not a spreadsheet problem. It is a doorway problem.

Almost every wrong number in your business was wrong the moment it went in.

This is step two of setting up business data. You have your shortlist of numbers. Now you make sure they enter the business clean.

HOW IT GETS ENTERED date: 03/04/26 date: 4 March date: 2026-03-04 lead: (blank) enquiry? booked call? three formats, two definitions, one blank ↓ one rule AT THE SOURCE one format one definition ✓ One clean record date: 2026-03-04 lead source: referral lead = booked call RIGHT THE FIRST TIME THE COST OF FIXING IT LATER €1 capture €10 correct €100 ignore

Bad data is born at the point of entry

Every wrong number started as a right one, entered wrong.

Last week you picked your shortlist, five to seven numbers with a decision behind each. This week is the unglamorous step that decides whether those numbers can ever be trusted: how they get recorded in the first place.

There is an old computing phrase that says it plainly. Garbage in, garbage out. A dashboard can only ever be as good as the records feeding it. If a number is entered three different ways by three different people, no chart at the end will save it.

Case example · a composite, not a real client

The seven person marketing agency near Eindhoven, around EUR 40,000 a month in revenue. Their weekly lead count swung by about a third for no real reason. The cause was not the report. One person logged a lead the moment an email arrived, another only once a call was booked, and they typed dates three ways. The number was broken before it was ever counted.


Fixing it later costs ten times more

The cheapest place to fix a number is before it exists.

There is a well known rule in data quality, first set out by George Labovitz and Yu Sang Chang in 1992. They put a cost on each stage of a bad record.

Prevention costs one. Correction costs ten. Failure costs a hundred.

Catch it at entry and it is cheap. Fix it later and it costs about ten times more. Act on it wrong and it costs about a hundred.

The exact figures are old and were written for large companies, so treat them as illustration, not gospel. The ratio is what matters, and the ratio holds at any size. Gartner put the average cost of poor data quality to a large organisation at 12.9 million USD a year. You are not immune because you are small. You just meet the same problem in miniature, one wrong invoice total and one mislabelled lead at a time.

For a founder, the lesson is simple. Time spent making data hard to enter wrong is worth roughly ten times the same time spent cleaning it up afterward.


Set your capture rules once, at the door

Decide how a number is recorded before anyone records it.

Clean capture is not about discipline or trying harder. It is about removing the chance to get it wrong. You do that with a few rules agreed once and applied every time. Here is the short list that covers most small businesses.

1
One format per field

Pick one way to write a date, one currency, one way to write a client name. The agency moved every date to one format and half their confusion disappeared.

2
Offer choices, not blank boxes

A dropdown or a toggle beats a text field every time. If lead source is a menu of five options, nobody can invent a sixth spelling.

3
One definition per field, agreed once

This is the thread from last week. A lead means one thing. Write the definition down where the data is entered, not in someone's head.

4
Make the important fields required

If a number matters, it cannot be left blank. A missing value is a silent error that surfaces weeks later.


Build the form, not the fix

Make the right way the only way it can be done.

Rules that live in a document get forgotten. Rules built into the thing people actually type into get followed without anyone thinking about it. This is the real shift: stop relying on memory and start relying on the form.

For the agency, the fix was small and took an afternoon. One shared intake form for every new enquiry. A dropdown for lead source. A single toggle for booked or not booked. One agreed definition of a lead printed at the top.

The result was not a fancier dashboard. It was a weekly lead number that finally sat still, because there was only one way to enter it. A number you can trust is worth more than a number that looks impressive.

The same idea scales to everything you capture. Time logged against projects, invoice amounts, expenses, hours booked. Wherever a person types a number into your business, that is a doorway, and every doorway deserves one clear rule.


Your fifteen minute start, and what comes next

You do not need new software today. You need one clean doorway.

Take the shortlist you wrote last week and pick the single number you rely on most. Find the exact spot where it first enters your business, the form, the sheet, the tool, the sticky note. Then do three things.

1
Write the one definition of that number, in a sentence

So it means the same thing to everyone who touches it.

2
Fix the format, so it is entered one way only

One date format, one currency, one spelling.

3
Turn the blank box into a choice wherever you can

A short menu removes the chance to invent a new answer.

That is one doorway sealed. Next week is step three, giving your data one home, so every clean number you capture lands in a single place instead of scattering across private copies that quietly drift apart.

DD
Dominique Danse Founder, Do-Creates  ·  Controller & Business Strategist

Want your numbers to add up the first time?

If your reports never quite agree and you are not sure which doorway is leaking, book a free clarity call. No pitch, no obligation, just a clear look at where your data is going wrong and the first rule to fix it.

Book your free clarity call

Do-Creates works with SME founders on financial clarity and business strategy. This post does not constitute financial or legal advice.