Parent question

Phonological processes by age: when do speech patterns go away?

Published 21 October 2026 · Updated 21 October 2026

The short answer

Young children simplify words in predictable ways, called phonological processes or patterns, and most fade by age 3 to 5. Saying “tat” for “cat” (fronting) usually stops by about 4, while saying “wabbit” for “rabbit” (gliding) can last until about 6 or 7. If a pattern continues well past the usual age, or your child uses unusual patterns, it’s worth asking a speech-language pathologist (SLP).

Common patterns and when they usually fade

From ASHA’s clinical reference table. The ages are typical guides compiled from clinical texts, not strict deadlines.

Selected phonological patterns and the age by which they usually fade (ASHA)
Pattern	Example	Usually gone by about
Final consonant deletion	“bu” for bus	3
Assimilation (consonant harmony)	“kak” for tack, “munny” for funny	3
Fronting	“tat” for cat, “date” for gate	4
Weak syllable deletion	“nana” for banana	4
Deaffrication	“ship” for chip	4
Cluster reduction	“top” for stop, “keen” for clean	4 (without S), 5 (with S)
Stopping	“pun” for fun, “tee” for see	3 to 5, depending on the sound
Gliding	“wabbit” for rabbit, “yeyo” for yellow	6 to 7

Patterns vs single sound errors

ASHA describes speech sound difficulties as either about making individual sounds (articulation) or about patterns that affect groups of sounds (phonological), and many children have some of both. A pattern like fronting changes every K and G, while an articulation error might affect just one sound, like a lisp on S. Speech or language: what’s the difference?

When to ask a speech therapist

A pattern continues well past the age in the table.
Your child uses unusual patterns not on the list, or is hard to understand for their age. How clear should my child’s speech be?
You’re worried. You don’t have to wait for a set age.

Dialect matters: if your family’s dialect or another language doesn’t use a sound, leaving it out isn’t an error (ASHA). For individual sounds, see speech sounds by age.

Questions parents ask

When should a child stop saying “tat” for “cat”?

Fronting usually fades by about age 4, according to ASHA’s reference table. If it continues past then, ask an SLP.

Is “wabbit” for “rabbit” normal at 5?

Often, yes. Gliding can last until about 6 or 7. See the R sound guide for more.

What’s the difference between a phonological process and a phonological disorder?

Processes are normal simplifications all young children use. When they continue past the usual age, or are unusual, ASHA says that points to a phonological disorder, which an SLP can treat.