Sanger vs NGS: Cost and Turnaround by the Job You Are Buying
Sanger versus NGS cost and turnaround for clone or variant work is a job comparison, not a cheaper-machine contest. Prefer Sanger when the question is one known stretch. Prefer NGS when the question is many targets or low-frequency variants and the batch fills a run. Neither method has a single official price. Dated cards are examples. They are not a synthesized menu.
Buy Confirmation or Discovery, Not a Cheaper Sequencer
Illumina’s beginners page splits the pair by volume: Sanger is treated as cost-effective at roughly 1–20 targets; NGS is the cheaper screen once target count and discovery power rise. Sanger’s published limit of detection on that page is about 15–20% allele fraction. Those are vendor heuristics, not a cloning-core price list. They are enough to refuse a trophy.
Compare the Unit on the Quote
Lab Manager’s 2025 comparison states the cost shape: Sanger scales poorly as reactions multiply; NGS has high upfront or core-minimum cost and a lower per-base bill at volume. Dollar figures on that page are dated examples. Do not treat them as current official prices.
| Dimension | Sanger | NGS (short-read) |
|---|---|---|
| Quoted unit | Per reaction, sometimes per primer walk | Library plus run plus analysis — not a per-clone card |
| Turnaround driver | Overnight to a few days at many cores; the queue still rules | Faster at high volume; slower if the run waits to fill |
| Discovery versus confirmation | Confirmation of a known stretch | Discovery and low-frequency variants |
| Batching / multiplexing | Twenty reactions stay twenty reactions | Pooling drops cost per sample once the run fills |
| Hidden prep or analysis line | Template prep and primer lines | Library prep and bioinformatics often extra |
Do not compare a per-reaction sticker to a per-gigabase sticker and call the lower number the winner. Ask the core which unit you are buying. A library-prep fee that is missing from the NGS card can erase an apparent per-base saving. A Sanger walk that needs twelve primers can erase an apparent per-reaction saving.
A Clone Check Is Not a Variant Survey
A miniprep confirmation of one insert is a Sanger job until the target list explodes. Walking an entire construct as many overlapping reactions can still be Sanger — until the walk is cheaper as a small NGS library. Clinical turnaround papers are not cloning-core laws. Do not import a 22-day BRCA median as tonight’s plasmid queue. A core that batches NGS once a week can still return one Sanger reaction overnight. Ask which queue you are joining, not which instrument is newer.
Two Methods, Same Labels
Sanger buys one fragment per reaction and a familiar trace. NGS buys parallel fragments and an analysis step. Prefer Sanger for a handful of known clones. Prefer NGS for panels, surveys, or rare variants once prep and analysis are in the quote. No column is cheaper in general. Template-class extras on a Sanger invoice — plasmid versus PCR — live on the sibling page.
A Card Is Not the Invoice
Service menus change. Software total cost of ownership is a different bill; hidden plasmid-software costs already have a page, and ELN license cost has another. If a Zettalab software price is mentioned at all, record the conflict checked on 2026-09-03: the pricing page Standard card showed $16.99 struck through and $9.9, while the same-page FAQ said all features are available for 10/month and individual features at $5/month each. Record both. Do not synthesize one official Zetta price, and do not claim any sequencer is cheaper than any software.
Frequently Asked Questions
Is Sanger always cheaper than NGS for checking a plasmid?
Usually, for one known stretch. Once you are walking an entire construct or many clones as a panel, ask for both units before declaring a winner.
Can I treat a published per-sample card as the official price?
No. Cards age. Zettalab's own pricing page card and FAQ disagreed on 2026-09-03; do not synthesize one official software price either.
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