IT disaster recovery plan, Pellcrest Accounting

IT disaster recovery plan template with systems, RTO and restore steps

An IT disaster recovery plan has to say which systems come back first, how much data each one can afford to lose, and the exact steps to restore them, so that a failed server or a ransomware attack becomes a procedure rather than a panic. This plan for a 22 person accounting practice ranks 11 systems by RTO and RPO and pairs them with a backup schedule, four restore procedures, contacts and a test log.

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Pellcrest Accounting

IT disaster recovery plan

Which systems come back first, how much data each one can lose, and the exact steps to restore them.

Practice manager and IT provider
Reviewed 13 April 2026
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1. Purpose and scope

This plan restores Pellcrest Accounting's IT systems and data after a failure, a cyber attack or the loss of the office. It covers the 11 systems the practice's 22 staff use to prepare tax returns, keep client files, run payroll for clients and bill time. It does not cover how the practice keeps serving clients while systems are down; that is the business continuity plan, which calls this one.

The practice holds tax identification numbers, bank details and financial statements for about 1,900 clients. A restore that brings back the wrong data, or brings back an infected copy, is worse than a slow one. Every restore in section 5 therefore ends with a check before staff are let back in.

11
Systems covered
4 hours
Shortest RTO
15 min
Shortest RPO
3
Backup copies
Two terms used throughout
Recovery time objective (RTO)
How long after a failure the system must be working again.
Recovery point objective (RPO)
How much recent data the practice can afford to lose, measured back from the moment of failure. An RPO of 1 hour means backups at least every hour.
2. Systems, RTO and RPO

Systems are restored in tier order. Tier 1 systems stop all client work; tier 3 systems can wait a week.

Tier
System
Where it runs
RTO
RPO
Owner
1
Identity and email, with multi factor sign in
Cloud suite
4 hours
15 minutes
IT provider
1
Practice management, time and billing
Cloud, vendor hosted
4 hours
1 hour
Practice manager
1
Tax preparation and filing software
Office server, virtual machine
8 hours
1 hour
IT provider
1
Client document store
Office file server
8 hours
1 hour
IT provider
2
Client payroll software
Cloud, vendor hosted
24 hours
4 hours
Payroll lead
2
Client portal and e-signing
Cloud, vendor hosted
24 hours
4 hours
Practice manager
2
Accounting ledgers for bookkeeping clients
Cloud, vendor hosted
24 hours
24 hours
Bookkeeping lead
2
Phones and call recording
Cloud phone system
24 hours
Not backed up
Practice manager
3
Staff laptops (22)
Managed devices
3 days
24 hours
IT provider
3
Office network, wifi and printers
On site
5 days
Config only
IT provider
3
Archive of closed client files
Cloud storage, cold tier
7 days
7 days
IT provider
Tier
System
Where it runs
RTO
RPO
Owner
1
Identity and email, with multi factor sign in
Cloud suite
4 hours
15 minutes
IT provider
1
Practice management, time and billing
Cloud, vendor hosted
4 hours
1 hour
Practice manager
1
Tax preparation and filing software
Office server, virtual machine
8 hours
1 hour
IT provider
1
Client document store
Office file server
8 hours
1 hour
IT provider
2
Client payroll software
Cloud, vendor hosted
24 hours
4 hours
Payroll lead
2
Client portal and e-signing
Cloud, vendor hosted
24 hours
4 hours
Practice manager
2
Accounting ledgers for bookkeeping clients
Cloud, vendor hosted
24 hours
24 hours
Bookkeeping lead
2
Phones and call recording
Cloud phone system
24 hours
Not backed up
Practice manager
3
Staff laptops (22)
Managed devices
3 days
24 hours
IT provider
3
Office network, wifi and printers
On site
5 days
Config only
IT provider
3
Archive of closed client files
Cloud storage, cold tier
7 days
7 days
IT provider
Tier
System
Where it runs
RTO
RPO
Owner
1
Identity and email, with multi factor sign in
Cloud suite
4 hours
15 minutes
IT provider
1
Practice management, time and billing
Cloud, vendor hosted
4 hours
1 hour
Practice manager
1
Tax preparation and filing software
Office server, virtual machine
8 hours
1 hour
IT provider
1
Client document store
Office file server
8 hours
1 hour
IT provider
2
Client payroll software
Cloud, vendor hosted
24 hours
4 hours
Payroll lead
2
Client portal and e-signing
Cloud, vendor hosted
24 hours
4 hours
Practice manager
2
Accounting ledgers for bookkeeping clients
Cloud, vendor hosted
24 hours
24 hours
Bookkeeping lead
2
Phones and call recording
Cloud phone system
24 hours
Not backed up
Practice manager
3
Staff laptops (22)
Managed devices
3 days
24 hours
IT provider
3
Office network, wifi and printers
On site
5 days
Config only
IT provider
3
Archive of closed client files
Cloud storage, cold tier
7 days
7 days
IT provider
3. Backup schedule

The practice keeps three copies of its data on two kinds of storage, with one copy off site and one that cannot be changed or deleted for 30 days, even by an administrator. That immutable copy is what makes recovery from ransomware possible.

What
How often
Where
Kept for
Immutable
Office server, full image
Nightly, 11 pm
Backup appliance in the comms room
14 days
No
Office server, changes only
Every hour, 7 am to 7 pm
Backup appliance
48 hours
No
Server image copy
Nightly, after the image
Cloud backup, another region
90 days
Yes, 30 days
Email and cloud files
Every 15 minutes
Third party cloud backup
7 years
Yes, 30 days
Practice management export
Daily, 6 am
Cloud backup
90 days
Yes, 30 days
Firewall and switch settings
After every change
IT provider's vault
Last 10
No
Vendor hosted systems
Practice management, payroll, the client portal and the ledgers are backed up by their vendors. The practice also exports its own copy of practice management data daily, because a vendor backup restores the vendor's platform, not one customer's mistake.
4. Declaring a disaster

The practice manager, or a partner when the practice manager is away, declares a disaster when a tier 1 system is down and the IT provider expects it to stay down longer than its RTO, or at the first sign of ransomware. Declaring starts the clock on the restore steps, the client message and the insurer's notice.

Hour 0, contain
Isolate affected machines, disable compromised accounts, call the IT provider and the cyber insurer's incident line.
Hour 1, decide
The practice manager and IT provider choose the restore path from section 5 and the restore point to use.
Hours 1 to 8, restore tier 1
Identity and email first, then practice management, tax software and the document store.
Day 2 to 3, restore tiers 2 and 3
Payroll, portal, ledgers and phones, then laptops by team.
Day 5, review
What happened, what data was lost, what changes, and whether any client or regulator must be told.
5. Restore steps
5.1 Office server failure
1.
IT provider confirms the server cannot be repaired within 8 hours.
2.
Start the latest good server image as a virtual machine on the backup appliance.
3.
Check the tax software opens three recent client files and the document store shows today's folders.
4.
Point staff drives at the appliance and tell staff which work from the lost hour must be redone.
5.
Order replacement hardware; move back to it after hours once it has run for 48 hours.
5.2 Ransomware
1.
Disconnect the office from the internet at the firewall. Do not pay or reply to any demand.
2.
Call the cyber insurer's incident line before touching any machine, so evidence is kept.
3.
Reset every staff password and multi factor enrolment from a clean device.
4.
Find the last clean restore point by scanning images from the newest back, using the immutable cloud copy.
5.
Restore the server to new or wiped hardware, then reimage every laptop before it reconnects.
6.
Check client files against the practice management export for anything missing since the restore point.
7.
The practice manager decides with the insurer's advisers whether a data breach must be reported to clients and the privacy regulator.
5.3 Office lost or unusable
1.
Staff work from home on their laptops; every cloud system needs only internet access.
2.
Restore the server image to a cloud virtual machine from the cloud backup copy.
3.
Connect staff to it through the remote access gateway, tested each quarter.
4.
Divert office phones to mobiles from the phone system's admin page.
5.4 One deleted or corrupted file
1.
Staff member logs a request with the IT provider giving the file path and when it was last right.
2.
IT provider restores the hourly version before that time to a separate folder.
3.
Staff member checks it and moves it back; the IT provider records the restore in the log.
6. Contacts
Who
For
How
Brightmoor IT, managed provider
All restores, first call for any outage
555 0124, 24 hours
Cyber insurer incident line
Ransomware, data breach, forensic help
555 0190, 24 hours
Practice management vendor
Platform outage, data recovery
Support portal, priority 1
Tax software vendor
Licence moves, reinstall
Support line, business hours
Internet provider
Office link down
555 0115
Practice manager, Dana Whitlock
Declares a disaster, client messages
Staff list
Managing partner, Rui Castell
Decisions on breach reporting
Staff list
Who
For
How
Brightmoor IT, managed provider
All restores, first call for any outage
555 0124, 24 hours
Cyber insurer incident line
Ransomware, data breach, forensic help
555 0190, 24 hours
Practice management vendor
Platform outage, data recovery
Support portal, priority 1
Tax software vendor
Licence moves, reinstall
Support line, business hours
Internet provider
Office link down
555 0115
Practice manager, Dana Whitlock
Declares a disaster, client messages
Staff list
Managing partner, Rui Castell
Decisions on breach reporting
Staff list
Who
For
How
Brightmoor IT, managed provider
All restores, first call for any outage
555 0124, 24 hours
Cyber insurer incident line
Ransomware, data breach, forensic help
555 0190, 24 hours
Practice management vendor
Platform outage, data recovery
Support portal, priority 1
Tax software vendor
Licence moves, reinstall
Support line, business hours
Internet provider
Office link down
555 0115
Practice manager, Dana Whitlock
Declares a disaster, client messages
Staff list
Managing partner, Rui Castell
Decisions on breach reporting
Staff list
7. Test log

A backup that has not been restored is a hope, not a backup. The IT provider runs one restore test each quarter and a full exercise each year, and records the time taken against the RTO.

Date
Test
Target
Actual
Result
13 Apr 2026
Server image started on the appliance
8 hours
2.5 hours
Passed. Tax software needed its licence reactivated; steps added to 5.1.
12 Jan 2026
Restore 20 client folders from the cloud copy
8 hours
3 hours
Passed.
13 Oct 2025
Full ransomware exercise, server to cloud machine
8 hours
11 hours
Failed RTO. Cloud machine was undersized; template resized.
14 Jul 2025
Email mailbox restore
4 hours
40 minutes
Passed.

Next tests: cloud machine restore on Monday 13 July 2026 to confirm the resized template meets the 8 hour RTO, and the annual full exercise on Monday 12 October 2026. This plan is reviewed after each exercise and after any real restore.

8. After every restore

Recovery is not finished when staff can log in. Within five working days of any declared disaster the practice manager and the IT provider complete these checks and record them with the test log.

The restore point used, and every piece of work entered after it that staff had to redo
Whether any client data was seen, copied or changed by someone outside the practice
Any client, regulator or insurer notice sent, with the date and who approved it
The actual recovery time for each tier 1 system against its RTO, and changes to this plan with an owner and a date

Section by section

What each section is for, so you can keep the ones you need and drop the rest.

Cover
Contract cover with the practice, the plan and the review date.
1. Purpose and scope
What the plan covers, four headline figures and the meaning of RTO and RPO.
2. Systems, RTO and RPO
Eleven systems in three tiers with location, targets and owner.
3. Backup schedule
Six backup jobs with frequency, location, retention and immutability.
4. Declaring a disaster
Who declares, the trigger, and an hour by hour response timeline.
5. Restore steps
Numbered steps for server failure, ransomware, office loss and one file.
6 to 8. Contacts, test log and after a restore
Who to call, four tests with target and actual times, and the checks that close an incident.

How to adapt this document

First, list every system staff use in a normal week, then set RTO and RPO by asking what a day without it costs and how much retyping you could bear; most small firms end up with three tiers like these. Second, match the backup schedule to the RPO, because an hourly RPO with a nightly backup is a promise the plan cannot keep. Third, run one restore test before you file the plan and write down the real time it took, even if it misses the target.

What makes this document work

Two numbers for every system

Each of the 11 systems carries an RTO and an RPO: identity and email must be back in 4 hours with no more than 15 minutes of lost mail, while the archive of closed files can wait 7 days. Grouping them into three tiers sets the restore order before anything breaks.

Built for ransomware, not just hardware

The backup schedule keeps three copies on two kinds of storage, with cloud copies that cannot be changed or deleted for 30 days. The ransomware steps start with disconnecting and calling the insurer before touching a machine, then search backwards for the last clean restore point.

The test log admits a failure

The October 2025 exercise missed its 8 hour RTO by 3 hours because the cloud machine was undersized. The log records the fix and books a retest for 13 July 2026, which is the evidence that the targets in section 2 are real.

Questions people ask

What is the difference between RTO and RPO?

The recovery time objective is how long a system can be down before it must be working again. The recovery point objective is how much recent data you can afford to lose, measured back from the failure. A system with a 4 hour RTO and a 1 hour RPO must be restored by lunchtime with no more than an hour of work missing.

Why keep an immutable backup copy?

Ransomware often looks for backups and encrypts or deletes them before demanding payment. A copy that cannot be changed or deleted for a set period, even by an administrator account, survives that attack. It is usually the copy that makes recovery possible without paying, which is why this plan keeps immutable copies of the server, email and practice data.

Do cloud software vendors back up my data for me?

They back up their platform, which protects against their failure, not necessarily yours. If a staff member deletes a client or a bad import overwrites records, restoring one customer's data can be slow or impossible. Exporting your own copy on a schedule, as this practice does daily, keeps that recovery in your hands.

Who should be allowed to declare an IT disaster?

One named person and a deputy, usually the practice or office manager and a partner or director. Declaring starts restores, client messages and insurance notices, so it needs authority and a clear trigger, such as a key system down longer than its RTO or any sign of ransomware. Waiting for consensus wastes the first hour.

What should happen after systems are restored?

Record the restore point used and the work staff had to redo, check whether any client data was seen or copied, send any notices required, compare actual recovery times with the targets, and change the plan where it fell short. Doing this within a week, while memories are fresh, is what makes the next recovery faster.

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