Double data entry is not a people problem. It is usually a handover problem. A job is created in one system, copied into a spreadsheet, then typed into finance software. The work is real; the retyping is often unnecessary.
The short answer: pick one piece of information and trace every place it is typed. Decide which system owns it. Then let the other systems read it, check it with a plain rule, and show a person only the exceptions.
Scene 5 of 5
The job, closed in Simpro. Job 1042 for Harbour Cafe (sample) is complete. Its tracking category comes from Xero.
Then someone types it again. At 7:40 pm the office copies job 1042 into the jobs spreadsheet and picks a cost centre by hand.
Simpro · Job 1042Complete
Harbour Cafe (sample)
Closed by Sam (sample)
- Labour12 h × $150$1,800.00
- MaterialsCable and fittings$600.00
- Garage outletExtra fitting$180.00
- Subtotal
- $2,580.00
Tracking category: Electrical, from Xero.
Spreadsheet · JobsTyped by hand
Row 214: Harbour Cafe
- Job1042
- AmountTyped again$2,580.00
- Cost centrePicked from a listMaintenance
Typed at 7:40 pm.
A plain rule compares the copy with the owner. Customer and amount agree. The cost centre typed by hand is not on Xero's tracking list.
Checked by a rule Simpro job
Checked by a rule Spreadsheet
Customer
CustomerSimpro job: Harbour Cafe
✓CustomerSpreadsheet: Harbour Cafe
Amount
AmountSimpro job: $2,580.00
✓AmountSpreadsheet: $2,580.00
Tracking
TrackingSimpro job: Electrical
✕TrackingSpreadsheet: Maintenance
- Customer and amount agree
- Maintenance is not on Xero's tracking list
A person decides. You choose: code it from Xero's list, or keep the typed one. The rule only brings it to you.
Office · Job 1042
Needs a decision Waiting for the officeCoded from XeroKept, with a note
Code job 1042 as Electrical, from Xero's list?
The spreadsheet says Maintenance, typed by hand.
Coded once, from the owner.Kept, with a note to fix the list. Job 1042 keeps Electrical, the category Xero owns. The spreadsheet column reads it instead of being typed.The office keeps Maintenance and notes it must be added to Xero's tracking list first, so the next job reads it from there.
Spreadsheet · JobsReads Simpro
Row 214: Harbour Cafe
- Job1042
- AmountFrom Simpro$2,580.00
- TrackingFrom Xero's listElectrical
Nobody typed it again.
Simpro · Job 1042 noteFollow-up
Harbour Cafe (sample)
- TrackingMaintenance, add it in Xero first
Codes come from one place: your accounting software.
End of the day Each piece of information has one owning system. The others read it, a plain rule checks the copies, and a person sees only the exceptions.
Start with one piece of information
- 01 · StartsWhere it starts
Simpro Job 1042 Complete
- Harbour Cafe$2,580.00
- 02 · CopiedWho copies it
Spreadsheet Row 214 By hand
- Job 1042$2,580.00
- Typed at7:40 pm
- 03 · Ends upWhere it must end up
Xero Invoice Draft
$2,580.00
Typed a third time.
At the end of the day Three places, one piece of information. Two of them were typed by hand.
Pick something that gets entered repeatedly: a customer name, job number, invoice amount, new-starter details or a lead. Write down where it starts, who copies it, and where it must end up. This reveals the process between the software, not just the software itself.
Where double data entry hides between job software and Xero
Codes chosen in two places
Tracking categories live in Xero. Change them there and the job software's mapping can stop fitting.
A purchase entered twice
The quote lives in an email, so the bill is typed from scratch.
Reports rebuilt by hand
Numbers exported, pasted into a workbook and adjusted each month.
Most job software already connects to the accounts. Simpro’s listing in the Xero App Store describes its Xero integration as a way “to help you eliminate manual data entry”.1 So the retyping is rarely the invoice itself. It hides in the gaps around the connection.
What the link moves, and the five gaps in detail
Simpro’s listing names contacts, invoices and credits, supplier invoices and payments among what its accounting link can transfer. It also says accounts and tracking categories are shared from Xero to Simpro, not the other way.1
- Codes chosen in two places. The chart of accounts and tracking categories live in Xero. If someone changes them in Xero, the mapping in the job software can stop fitting, and someone fixes the result by hand.
- Cost centres kept outside the accounts. Xero uses tracking categories and options instead of department codes or cost centres.3 If the business tracks cost centres in a spreadsheet as well, every job is coded twice.
- A purchase entered more than once. In MYOB a supplier quote can be changed to an order or a bill when you are ready to buy.2 If the quote lives in an email and the bill is typed from scratch, the same purchase is entered twice.
- Reports rebuilt by hand. Numbers are exported, pasted into a workbook and adjusted each month. That is double data entry with a formula on top.
- Emails that carry data. A result typed into an email, then typed again into a record, is entered twice even if nobody calls it data entry.
Ask four useful questions
- Which system should own the record?
- Is the next step a repeatable rule or a judgement call?
- What must be checked before it moves?
- What happens when the information is missing or unusual?
A worked example: KPI results at two businesses
- 01 · JotformThe manager submits
Monthly KPI reviewEntered once, on the form
- 02 · n8nn8n picks it up
- Submission received
- Employee details read
- 03 · AirtableAirtable calculates
Airtable KPI Calculated
- Employee detailsRead
- KPI calculationDone
- 04 · DoneEmails and the record
Airtable Final KPI Filed
Written back
Employee and management emailed.
At the end of the day The review is entered once, on the form. Nobody types the result again.
For Elliotts Landscape and Harrys Tyres, I built a monthly KPI process. Both builds used the same three tools, each with one job.
What each tool does
- Jotform holds the KPI form. The manager submits the review there.
- Airtable manages the employee details and the KPI calculations.
- n8n picks up the submission, reads the employee’s details, sends automatic emails to the employee and to management, and writes the final KPI back to Airtable.
Hours a month, before the build
Plus countless emails. Now the manager submits the form and the rest is automatic. Net time saved and financial return were not measured.
Source: Renzo’s estimate of office and admin staff time at each business, before the KPI builds
The lesson: decide which system owns each piece of information first. Here the form owns the review and Airtable owns the employee details and the calculation. Once that was settled, connecting the steps was the easy part. The KPI reporting automation page describes the build.
A checklist for one piece of information
- Name it. One item, such as a job number, a supplier bill or a KPI result.
- Trace it. List every place it is typed, copied or pasted, and who does it.
- Pick the owner. One system holds the master copy. Everything else reads from it.
- Check the codes. Accounts, tax codes and tracking categories come from one place, usually your accounting software.
- Use what you have. Check whether your job software or accounting software already moves it, such as an accounting link or turning a quote into a bill.
- Write the rule. What must be true before it moves on: a total that agrees, a reference that exists, no duplicate.
- Name the exception owner. Who looks at a record that fails the rule, and where they see it.
- Count it for a week. How many times it is entered and how long it waits.
What usually happens next
A setting
A mapping corrected, or a code dropped from a spreadsheet because the accounting software already holds it.
A habit
Turning a quote into a bill instead of typing the bill again.
A build
Only the rest: a rule carries the information from one system to the next, and a person sees the exceptions.
Start with the settings and the habits. Do not automate a bad handover: connecting two messy processes can make errors move faster.
Why settings first, a better first measure, and what to agree before you connect anything
Settings and habits are quick to try, and they make any later build smaller, because the automation only has to carry information that already has one owner.
First agree on the source of truth, the minimum information required and the visible exception path. Then connect the routine work.
Count duplicate entries and waiting points for one week. That gives you a credible starting point, without pretending every improvement can be reduced to a dollar figure.
For new-starter paperwork, use the document-handover worksheet to name the owner, checker and missing-information route before connecting the tools.
Where a person stays in charge
Automation carries
A step that is repeatable: the same rule, every time.
AI may assist
Information that needs interpreting: a draft or a classification.
A person approves
Where the consequence matters, a person approves the exception.
Watch the Simpro to Xero invoice check run on sample data: the system moves known information, an automation applies consistent steps, and a person keeps review and sending decisions.
If you would like a second pair of eyes on where your double data entry sits, start with a Workflow Audit. I review how your job software and accounts connect today, read-only, and tell you what is worth building and what is not.
Questions
Doesn’t my job software already send invoices to Xero?
Often it does. Simpro’s listing in the Xero App Store lists contacts, invoices and credits, supplier invoices and payments among what its accounting link can transfer. The retyping usually hides in the gaps around that connection: codes, cost centres, purchases, reports and emails.
Which system should own the information?
Pick one system to hold the master copy, and let everything else read from it. Accounts, tax codes and tracking categories usually come from your accounting software.
How much time did the KPI builds save?
Before, it took about 4 hours each month at each business, plus countless emails. Now it is a click of a button. I have not measured net time saved or financial return.
Where do I start?
With one piece of information and one week of counting: how many times it is entered and how long it waits. The checklist above takes you through it.
Sources
- 1. Simpro listing, Xero App Store (Australia), read 17 October 2026: apps.xero.com/au/app/simpro
- 2. MYOB Support, “Entering purchases”, read 17 October 2026: myob.com/au/support/myob-business/purchases/entering-purchases
- 3. Xero Central, “Set up tracking categories and options”, read 17 October 2026: central.xero.com/s/article/Set-up-tracking-categories
Not sure which to fix first?
Get a free fit check by email and I will say whether it is worth automating. No call needed. The next step is a A$990 workflow audit: the top 3 things worth automating, with a fixed quote for each.
Get a free fit check by email