Continuous Data Protection vs Scheduled Backups

Data is the lifeblood of every UK business. Customer records, financial data, contracts, intellectual property, employee information — lose any of it, and your business faces not just operational disruption but potential legal consequences under the UK GDPR, reputational damage, and in severe cases, existential threat. The question is not whether you need to back up your data — every business does — but how you back it up and how much data you can afford to lose when disaster strikes.

This question brings us to two fundamentally different approaches to data protection: Continuous Data Protection (CDP), which captures every change as it happens, and scheduled backups, which capture snapshots at predetermined intervals. Both have their place, and understanding the differences, advantages, and limitations of each approach is essential for designing a backup strategy that genuinely protects your business.

This guide provides a thorough comparison of both approaches, helping you determine which is right for your UK business — or whether a combination of both delivers the optimal balance of protection, performance, and cost.

Understanding the Fundamentals

What Are Scheduled Backups?

Scheduled backups are the traditional approach to data protection. Your backup system takes a snapshot of your data at regular intervals — typically once per day, though some businesses run backups every few hours. Between backups, any changes to your data are not captured. If your daily backup runs at midnight and your server fails at 5pm the following day, you lose up to 17 hours of data. This gap between the last successful backup and the point of failure is called the Recovery Point Objective (RPO).

Scheduled backups can be full (copying all data every time), incremental (copying only data that has changed since the last backup), or differential (copying all data that has changed since the last full backup). Most modern backup systems use a combination — a weekly full backup with daily incremental backups — to balance storage efficiency with recovery speed.

What Is Continuous Data Protection?

Continuous Data Protection, or CDP, takes a fundamentally different approach. Instead of waiting for a scheduled backup window, CDP monitors your data in real time and captures every change as it occurs. Every file modification, every database transaction, every email received is immediately replicated to the backup destination. If your server fails at 5pm, you can recover to the state it was in at 4:59pm — or even 4:59:58pm — with virtually zero data loss.

True CDP captures changes at the block level, recording every write operation to disk. This creates a continuous journal of changes that allows recovery to any point in time, not just predefined backup points. Near-CDP solutions (sometimes called journal-based backup) capture changes at short intervals — every 5, 15, or 30 minutes — offering a practical middle ground between scheduled backups and true CDP.

When CDP Is the Right Choice

Continuous Data Protection is not necessary for every business or every workload, but there are scenarios where it is clearly the superior choice.

Transaction-heavy databases. If your business runs a database that processes hundreds or thousands of transactions per hour — an e-commerce platform, a financial trading system, a busy CRM — the cost of losing even one hour of transactions can be enormous. For a Bristol-based online retailer we work with, losing one hour of orders during peak trading could mean £15,000 in lost revenue that would never be recovered.

Regulated industries. Businesses in financial services, healthcare, or legal sectors often face regulatory requirements for data integrity and recoverability. The Financial Conduct Authority (FCA) expects regulated firms to be able to recover critical data with minimal loss. The Solicitors Regulation Authority (SRA) requires law firms to protect client data to the highest standard. CDP provides the demonstrable, near-zero data loss capability these regulators expect.

Ransomware recovery. In a ransomware attack, the ability to recover to a precise point in time is invaluable. If you can identify exactly when the ransomware began encrypting your files (say, 14:23 on Tuesday), CDP allows you to restore to 14:22 — before the attack began — losing virtually nothing. With daily scheduled backups, you would have to restore to the previous night's backup, losing an entire day of work.

When Scheduled Backups Are Sufficient

For many UK small businesses, well-implemented scheduled backups provide adequate protection at a significantly lower cost than CDP. Scheduled backups are typically sufficient when your data changes relatively slowly, the cost of losing a few hours of data is manageable, your budget is constrained, and your workloads are primarily file-based rather than transactional.

A 15-person accountancy firm in Leeds, for example, creates and modifies documents throughout the day but does not process high-volume transactions. Losing a maximum of four hours of work (with four-times-daily backups) would be inconvenient but not catastrophic — the documents could be recreated from drafts, notes, and memory. For this firm, hourly or four-times-daily scheduled backups provide an excellent balance of protection and cost.

The Hybrid Approach: Best of Both Worlds

In practice, many UK businesses benefit from a hybrid approach that applies CDP to their most critical systems and scheduled backups to everything else. This tiered strategy aligns the level of protection with the value and sensitivity of the data.

Cost Comparison

Cost is inevitably a factor in the CDP versus scheduled backup decision. Here is a realistic comparison for a typical UK SME with 30 users and 2TB of data.

Scheduled backup solutions such as Veeam, Acronis, or Datto typically cost between £200 and £800 per month for a 30-user business, depending on the solution and whether backups are stored locally, in the cloud, or both. This includes the software licence, cloud storage, and monitoring.

CDP solutions are more expensive, typically ranging from £500 to £2,000 per month for a similar environment. The higher cost reflects the increased storage requirements (capturing every change generates more data than periodic snapshots), the more sophisticated software, and the higher performance demands on your infrastructure.

However, the cost of CDP must be weighed against the cost of data loss. If losing one day of data costs your business £5,000 in recreated work, lost orders, and recovery effort, and you experience one significant data loss event every two years, the effective annual cost of daily backups is £2,500 in expected data loss plus £4,800 in backup costs — totalling £7,300. CDP at £12,000 per year with near-zero data loss may actually be the more economical choice.

UK Compliance Considerations

For UK businesses, data protection compliance adds another dimension to the backup strategy decision. Under the UK GDPR, organisations must implement appropriate technical measures to protect personal data against accidental loss, destruction, or damage. Both CDP and scheduled backups can satisfy this requirement, but the definition of appropriate depends on the nature and volume of personal data you process.

The ICO has not prescribed specific backup frequencies, but their enforcement actions suggest that businesses processing large volumes of sensitive personal data should have more robust backup arrangements than those processing minimal personal data. If you handle medical records, financial data, or children's data, a more aggressive backup strategy (hourly or CDP) is prudent. For general business data with limited personal information, daily backups may suffice.

Regardless of which approach you choose, ensure your backup strategy includes regular testing (verify you can actually restore from your backups), off-site or cloud storage (protect against site-level disasters), encryption (protect backed-up data from unauthorised access), and retention policies (keep backups long enough to meet legal and regulatory requirements but not so long that you accumulate unnecessary risk).

Key Takeaways

The choice between Continuous Data Protection and scheduled backups is not binary — it is a spectrum, and the right answer depends on your data, your risk tolerance, your regulatory obligations, and your budget. For most UK SMEs, a hybrid approach that applies CDP to mission-critical systems and frequent scheduled backups to everything else delivers the optimal balance of protection and cost. Whatever approach you choose, the most important thing is that you have a tested, monitored, and regularly reviewed backup strategy in place. The businesses that survive data disasters are not the ones with the most expensive backup solutions — they are the ones whose backups actually work when needed.